./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_equal.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_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:26:53,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:26:53,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:26:53,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:26:53,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:26:53,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:26:53,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:26:53,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:26:53,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:26:53,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:26:53,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:26:53,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:26:53,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:26:53,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:26:53,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:26:53,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:26:53,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:26:53,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:26:53,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:26:53,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:26:53,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:26:53,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:26:53,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:26:53,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:26:53,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:26:53,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:26:53,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:26:53,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:26:53,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:26:53,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:26:53,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:26:53,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:26:53,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:26:53,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:26:53,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:26:53,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:26:53,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:26:53,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:26:53,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:26:53,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:26:53,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:26:53,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:26:53,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:26:53,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:26:53,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:26:53,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:26:53,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:26:53,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:26:53,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:26:53,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:26:53,573 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:26:53,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:26:53,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:26:53,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:26:53,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:26:53,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:26:53,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:26:53,575 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:26:53,575 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:26:53,575 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:26:53,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:26:53,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:26:53,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:26:53,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:26:53,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:26:53,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:26:53,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:26:53,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:53,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:26:53,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:26:53,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:26:53,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:26:53,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:26:53,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2021-11-20 07:26:53,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:26:53,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:26:53,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:26:53,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:26:53,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:26:53,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2021-11-20 07:26:54,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/data/c11ee3f6b/be093cc3b83a491ea3b0582793ed0b8b/FLAGca50eb471 [2021-11-20 07:26:54,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:26:54,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2021-11-20 07:26:54,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/data/c11ee3f6b/be093cc3b83a491ea3b0582793ed0b8b/FLAGca50eb471 [2021-11-20 07:26:54,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/data/c11ee3f6b/be093cc3b83a491ea3b0582793ed0b8b [2021-11-20 07:26:54,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:26:54,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:26:54,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:54,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:26:54,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:26:54,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:54" (1/1) ... [2021-11-20 07:26:54,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa2c78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:54, skipping insertion in model container [2021-11-20 07:26:54,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:54" (1/1) ... [2021-11-20 07:26:54,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:26:55,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:26:55,471 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_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2021-11-20 07:26:55,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:55,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:26:55,566 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_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2021-11-20 07:26:55,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:55,613 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:26:55,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55 WrapperNode [2021-11-20 07:26:55,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:55,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:55,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:26:55,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:26:55,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,707 INFO L137 Inliner]: procedures = 127, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 142 [2021-11-20 07:26:55,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:55,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:26:55,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:26:55,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:26:55,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:26:55,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:26:55,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:26:55,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:26:55,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (1/1) ... [2021-11-20 07:26:55,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:55,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:26:55,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:26:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:26:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:26:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 07:26:55,866 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 07:26:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:26:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:26:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:26:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:26:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:26:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:26:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:26:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:26:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:26:55,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:26:56,011 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:26:56,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:26:56,414 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:26:56,433 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:26:56,436 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:26:56,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:56 BoogieIcfgContainer [2021-11-20 07:26:56,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:26:56,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:26:56,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:26:56,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:26:56,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:26:54" (1/3) ... [2021-11-20 07:26:56,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf1ccd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:56, skipping insertion in model container [2021-11-20 07:26:56,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:55" (2/3) ... [2021-11-20 07:26:56,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf1ccd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:56, skipping insertion in model container [2021-11-20 07:26:56,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:56" (3/3) ... [2021-11-20 07:26:56,455 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2021-11-20 07:26:56,461 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:26:56,462 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2021-11-20 07:26:56,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:26:56,537 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 07:26:56,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2021-11-20 07:26:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 111 states have internal predecessors, (124), 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 07:26:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:26:56,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:56,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:26:56,567 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash 895059861, now seen corresponding path program 1 times [2021-11-20 07:26:56,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:56,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713567128] [2021-11-20 07:26:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:56,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:56,763 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 07:26:56,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:56,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713567128] [2021-11-20 07:26:56,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713567128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:56,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:56,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:26:56,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320753364] [2021-11-20 07:26:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:26:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:26:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:26:56,802 INFO L87 Difference]: Start difference. First operand has 116 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 111 states have internal predecessors, (124), 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) 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 07:26:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:56,956 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-20 07:26:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:26:56,959 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 07:26:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:56,969 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:26:56,969 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 07:26:56,971 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 07:26:56,979 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:56,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 07:26:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-20 07:26:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 106 states have internal predecessors, (113), 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 07:26:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-11-20 07:26:57,041 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 6 [2021-11-20 07:26:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:57,042 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-11-20 07:26:57,042 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 07:26:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2021-11-20 07:26:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:26:57,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:57,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:26:57,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:26:57,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash 895059862, now seen corresponding path program 1 times [2021-11-20 07:26:57,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:57,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638017432] [2021-11-20 07:26:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:57,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,154 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 07:26:57,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638017432] [2021-11-20 07:26:57,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638017432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:57,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:57,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:26:57,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275195728] [2021-11-20 07:26:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:26:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:57,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:26:57,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:26:57,159 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. 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 07:26:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:57,301 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-11-20 07:26:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:26:57,302 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 07:26:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:57,307 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:26:57,309 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:26:57,310 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 07:26:57,314 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:57,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 181 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:26:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-20 07:26:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 59 states have (on average 1.88135593220339) internal successors, (111), 104 states have internal predecessors, (111), 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 07:26:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-11-20 07:26:57,337 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 6 [2021-11-20 07:26:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:57,340 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-11-20 07:26:57,341 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 07:26:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-11-20 07:26:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:26:57,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:57,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:57,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:26:57,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 100467671, now seen corresponding path program 1 times [2021-11-20 07:26:57,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:57,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799456801] [2021-11-20 07:26:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:57,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,492 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 07:26:57,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799456801] [2021-11-20 07:26:57,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799456801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:57,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:57,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:26:57,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433039676] [2021-11-20 07:26:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:57,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:26:57,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:26:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:26:57,498 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 07:26:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:57,637 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-20 07:26:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:26:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 13 [2021-11-20 07:26:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:57,642 INFO L225 Difference]: With dead ends: 116 [2021-11-20 07:26:57,642 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:26:57,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:26:57,650 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 5 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:57,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 269 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:26:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:26:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-11-20 07:26:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 60 states have (on average 1.8666666666666667) internal successors, (112), 105 states have internal predecessors, (112), 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 07:26:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-11-20 07:26:57,673 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 13 [2021-11-20 07:26:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:57,674 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-11-20 07:26:57,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 07:26:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-11-20 07:26:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:26:57,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:57,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:26:57,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -900354020, now seen corresponding path program 1 times [2021-11-20 07:26:57,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:57,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666121430] [2021-11-20 07:26:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:57,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:26:57,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666121430] [2021-11-20 07:26:57,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666121430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:57,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:57,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:26:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599896898] [2021-11-20 07:26:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:57,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:26:57,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:26:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:26:57,850 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 07:26:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:58,126 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-20 07:26:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:26:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2021-11-20 07:26:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:58,129 INFO L225 Difference]: With dead ends: 110 [2021-11-20 07:26:58,129 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:26:58,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:26:58,137 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 13 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:58,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 380 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:26:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:26:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-20 07:26:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 60 states have (on average 1.85) internal successors, (111), 104 states have internal predecessors, (111), 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 07:26:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-11-20 07:26:58,153 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 22 [2021-11-20 07:26:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:58,153 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-11-20 07:26:58,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 07:26:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-11-20 07:26:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:26:58,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:58,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:58,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:26:58,155 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -900354019, now seen corresponding path program 1 times [2021-11-20 07:26:58,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:58,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507847860] [2021-11-20 07:26:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:58,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:26:58,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507847860] [2021-11-20 07:26:58,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507847860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:58,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:58,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:26:58,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304966350] [2021-11-20 07:26:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:58,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:26:58,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:26:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:26:58,359 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 07:26:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:58,621 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-20 07:26:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:26:58,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2021-11-20 07:26:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:58,623 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:26:58,623 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:26:58,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:26:58,624 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 11 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:58,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 404 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:26:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:26:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-11-20 07:26:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 103 states have internal predecessors, (110), 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 07:26:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-11-20 07:26:58,632 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 22 [2021-11-20 07:26:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:58,633 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-11-20 07:26:58,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 07:26:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-11-20 07:26:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:26:58,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:58,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:58,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:26:58,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash -375857467, now seen corresponding path program 1 times [2021-11-20 07:26:58,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:58,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953963524] [2021-11-20 07:26:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:58,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:26:58,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:58,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953963524] [2021-11-20 07:26:58,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953963524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:26:58,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391182261] [2021-11-20 07:26:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:58,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:58,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:58,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:26:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:26:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:59,020 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 07:26:59,173 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:26:59,174 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 07:26:59,245 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 07:26:59,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391182261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:59,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:26:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2021-11-20 07:26:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724921078] [2021-11-20 07:26:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:59,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:26:59,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:26:59,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:26:59,248 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 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 07:26:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:59,545 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-11-20 07:26:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:26:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 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 25 [2021-11-20 07:26:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:59,547 INFO L225 Difference]: With dead ends: 127 [2021-11-20 07:26:59,547 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 07:26:59,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:26:59,548 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:59,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 414 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:26:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 07:26:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2021-11-20 07:26:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 102 states have internal predecessors, (109), 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 07:26:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2021-11-20 07:26:59,555 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 25 [2021-11-20 07:26:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:59,572 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2021-11-20 07:26:59,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 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 07:26:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2021-11-20 07:26:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:26:59,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:59,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:59,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:59,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:26:59,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:26:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash -375857466, now seen corresponding path program 1 times [2021-11-20 07:26:59,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012005848] [2021-11-20 07:26:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:59,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:59,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:00,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012005848] [2021-11-20 07:27:00,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012005848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579346140] [2021-11-20 07:27:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:00,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:00,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:00,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:00,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:27:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:27:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:00,143 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 07:27:00,431 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:00,431 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 07:27:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579346140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:00,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 07:27:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912723741] [2021-11-20 07:27:00,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:00,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:27:00,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:27:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:27:00,644 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 13 states have internal predecessors, (36), 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 07:27:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:01,102 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-20 07:27:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 13 states have internal predecessors, (36), 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 25 [2021-11-20 07:27:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:01,103 INFO L225 Difference]: With dead ends: 107 [2021-11-20 07:27:01,104 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 07:27:01,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:27:01,105 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 111 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:01,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 577 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:27:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 07:27:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-11-20 07:27:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.8) internal successors, (108), 101 states have internal predecessors, (108), 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 07:27:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-11-20 07:27:01,111 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 25 [2021-11-20 07:27:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:01,112 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-11-20 07:27:01,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 13 states have internal predecessors, (36), 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 07:27:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-11-20 07:27:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:27:01,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:01,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:01,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:01,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:27:01,314 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1778867041, now seen corresponding path program 1 times [2021-11-20 07:27:01,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:01,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207379891] [2021-11-20 07:27:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:01,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:01,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:27:01,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207379891] [2021-11-20 07:27:01,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207379891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213637389] [2021-11-20 07:27:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:01,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:01,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:01,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:27:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 07:27:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:01,638 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 07:27:01,655 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 11 treesize of output 9 [2021-11-20 07:27:01,716 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:01,717 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 07:27:01,817 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:27:01,817 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 16 treesize of output 12 [2021-11-20 07:27:01,995 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:27:01,996 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 20 treesize of output 25 [2021-11-20 07:27:02,337 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:27:02,337 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 15 [2021-11-20 07:27:02,438 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:27:02,439 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 27 treesize of output 32 [2021-11-20 07:27:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:27:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:04,555 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_17|) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_17| 1) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) 1))) is different from false [2021-11-20 07:27:04,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213637389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:04,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-11-20 07:27:04,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241649775] [2021-11-20 07:27:04,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:27:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:27:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=322, Unknown=1, NotChecked=36, Total=420 [2021-11-20 07:27:04,559 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:05,050 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-11-20 07:27:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:27:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-11-20 07:27:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:05,052 INFO L225 Difference]: With dead ends: 120 [2021-11-20 07:27:05,052 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 07:27:05,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=79, Invalid=430, Unknown=1, NotChecked=42, Total=552 [2021-11-20 07:27:05,054 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 122 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:05,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 687 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 541 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2021-11-20 07:27:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 07:27:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-11-20 07:27:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 96 states have internal predecessors, (103), 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 07:27:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-11-20 07:27:05,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 37 [2021-11-20 07:27:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:05,060 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-11-20 07:27:05,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-11-20 07:27:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:27:05,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:05,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:05,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:05,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:05,286 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1778867040, now seen corresponding path program 1 times [2021-11-20 07:27:05,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59045354] [2021-11-20 07:27:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:05,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:05,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59045354] [2021-11-20 07:27:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59045354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:05,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:05,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:27:05,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916776160] [2021-11-20 07:27:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:27:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:27:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:27:05,552 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:27:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:05,928 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-11-20 07:27:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:27:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-20 07:27:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:05,930 INFO L225 Difference]: With dead ends: 111 [2021-11-20 07:27:05,930 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 07:27:05,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:05,931 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 188 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:05,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 204 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 07:27:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-11-20 07:27:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 88 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 07:27:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-11-20 07:27:05,934 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 37 [2021-11-20 07:27:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:05,934 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-11-20 07:27:05,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:27:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-11-20 07:27:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:27:05,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:05,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:05,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:27:05,935 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash -94242400, now seen corresponding path program 1 times [2021-11-20 07:27:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600170564] [2021-11-20 07:27:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:05,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:27:06,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600170564] [2021-11-20 07:27:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600170564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:06,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725891761] [2021-11-20 07:27:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:27:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:27:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:06,019 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:06,231 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-20 07:27:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-20 07:27:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:06,234 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:27:06,234 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:27:06,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:06,235 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 71 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:06,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 266 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:27:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-11-20 07:27:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.55) internal successors, (93), 86 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 07:27:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-20 07:27:06,244 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 39 [2021-11-20 07:27:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-20 07:27:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-20 07:27:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:27:06,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:06,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:27:06,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -94242399, now seen corresponding path program 1 times [2021-11-20 07:27:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180492944] [2021-11-20 07:27:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:06,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:06,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180492944] [2021-11-20 07:27:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180492944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:06,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:06,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824172295] [2021-11-20 07:27:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:06,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:27:06,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:27:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:06,403 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:06,577 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-11-20 07:27:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:06,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-20 07:27:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:06,586 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:27:06,589 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 07:27:06,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:27:06,590 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 72 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:06,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 289 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 07:27:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-20 07:27:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 84 states have internal predecessors, (91), 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 07:27:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-11-20 07:27:06,597 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 39 [2021-11-20 07:27:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:06,600 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-11-20 07:27:06,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-11-20 07:27:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:27:06,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:06,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:27:06,603 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -94242144, now seen corresponding path program 1 times [2021-11-20 07:27:06,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:06,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247026646] [2021-11-20 07:27:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:06,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:06,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247026646] [2021-11-20 07:27:06,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247026646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:06,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:06,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192211657] [2021-11-20 07:27:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:06,682 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:06,770 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-20 07:27:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-20 07:27:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:06,772 INFO L225 Difference]: With dead ends: 105 [2021-11-20 07:27:06,772 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 07:27:06,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:06,773 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:06,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 137 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 07:27:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-20 07:27:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 82 states have internal predecessors, (89), 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 07:27:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-20 07:27:06,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 39 [2021-11-20 07:27:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:06,779 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-20 07:27:06,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-20 07:27:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:27:06,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:06,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:06,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:27:06,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -372386587, now seen corresponding path program 1 times [2021-11-20 07:27:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928045207] [2021-11-20 07:27:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:06,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:27:07,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928045207] [2021-11-20 07:27:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928045207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467273844] [2021-11-20 07:27:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:07,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:07,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:07,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:27:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:27:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:07,634 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 13 treesize of output 9 [2021-11-20 07:27:12,729 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:27:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 07:27:12,742 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:27:12,743 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 07:27:14,617 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:14,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-11-20 07:27:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:27:14,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467273844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:14,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2021-11-20 07:27:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185996353] [2021-11-20 07:27:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:14,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:27:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:27:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=619, Unknown=5, NotChecked=0, Total=702 [2021-11-20 07:27:14,640 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:16,171 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2021-11-20 07:27:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:27:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-20 07:27:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:16,173 INFO L225 Difference]: With dead ends: 130 [2021-11-20 07:27:16,173 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 07:27:16,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=112, Invalid=752, Unknown=6, NotChecked=0, Total=870 [2021-11-20 07:27:16,174 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 67 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:16,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 868 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 647 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2021-11-20 07:27:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 07:27:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2021-11-20 07:27:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.459016393442623) internal successors, (89), 81 states have internal predecessors, (89), 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 07:27:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-11-20 07:27:16,181 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 41 [2021-11-20 07:27:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:16,181 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-11-20 07:27:16,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-11-20 07:27:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:27:16,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:16,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:16,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:16,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:27:16,413 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash -372386586, now seen corresponding path program 1 times [2021-11-20 07:27:16,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:16,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506196337] [2021-11-20 07:27:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:16,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:27:17,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506196337] [2021-11-20 07:27:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506196337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609508715] [2021-11-20 07:27:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:17,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:17,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:27:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:27:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:17,838 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 07:27:17,843 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 11 treesize of output 7 [2021-11-20 07:27:20,222 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:27:20,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 70 [2021-11-20 07:27:20,252 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:27:20,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 59 [2021-11-20 07:27:20,274 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:27:20,274 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 56 treesize of output 58 [2021-11-20 07:27:20,283 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:27:20,283 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 55 treesize of output 55 [2021-11-20 07:27:20,552 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:20,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-11-20 07:27:20,564 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:20,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 07:27:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:20,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:23,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609508715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:23,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:23,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-20 07:27:23,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316611029] [2021-11-20 07:27:23,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:23,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:27:23,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:27:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1358, Unknown=2, NotChecked=0, Total=1482 [2021-11-20 07:27:23,135 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:28,604 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-11-20 07:27:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:27:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-11-20 07:27:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:28,605 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:27:28,605 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:27:28,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=228, Invalid=2318, Unknown=4, NotChecked=0, Total=2550 [2021-11-20 07:27:28,607 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 31 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:28,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1197 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 822 Invalid, 0 Unknown, 152 Unchecked, 0.7s Time] [2021-11-20 07:27:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:27:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-11-20 07:27:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 81 states have internal predecessors, (88), 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 07:27:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-11-20 07:27:28,611 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 41 [2021-11-20 07:27:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:28,611 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-11-20 07:27:28,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-11-20 07:27:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:27:28,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:28,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:28,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:27:28,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:28,829 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1333284459, now seen corresponding path program 1 times [2021-11-20 07:27:28,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297977354] [2021-11-20 07:27:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:28,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:28,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297977354] [2021-11-20 07:27:28,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297977354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:28,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:28,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:27:28,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969309800] [2021-11-20 07:27:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:28,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:28,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:28,947 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:29,032 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-11-20 07:27:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-11-20 07:27:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:29,034 INFO L225 Difference]: With dead ends: 103 [2021-11-20 07:27:29,034 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:27:29,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:29,036 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 141 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:29,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 152 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:27:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-11-20 07:27:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 80 states have internal predecessors, (87), 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 07:27:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-11-20 07:27:29,043 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 42 [2021-11-20 07:27:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:29,044 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-11-20 07:27:29,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-11-20 07:27:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:27:29,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:29,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:29,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:27:29,046 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1386112687, now seen corresponding path program 1 times [2021-11-20 07:27:29,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:29,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783747790] [2021-11-20 07:27:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:29,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:27:29,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783747790] [2021-11-20 07:27:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783747790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:29,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:27:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650101412] [2021-11-20 07:27:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:29,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:29,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:29,199 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:29,538 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2021-11-20 07:27:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:27:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-11-20 07:27:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:29,540 INFO L225 Difference]: With dead ends: 148 [2021-11-20 07:27:29,540 INFO L226 Difference]: Without dead ends: 148 [2021-11-20 07:27:29,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:27:29,541 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 268 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:29,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 408 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-20 07:27:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2021-11-20 07:27:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.4) internal successors, (91), 83 states have internal predecessors, (91), 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 07:27:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-11-20 07:27:29,546 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 44 [2021-11-20 07:27:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:29,547 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-11-20 07:27:29,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-11-20 07:27:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:27:29,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:29,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:29,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:27:29,571 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1386112688, now seen corresponding path program 1 times [2021-11-20 07:27:29,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:29,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37705299] [2021-11-20 07:27:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:29,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:27:29,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37705299] [2021-11-20 07:27:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37705299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:29,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:29,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:27:29,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923486782] [2021-11-20 07:27:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:29,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:29,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:29,812 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:30,161 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-11-20 07:27:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-11-20 07:27:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:30,163 INFO L225 Difference]: With dead ends: 130 [2021-11-20 07:27:30,163 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 07:27:30,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:27:30,164 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 275 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:30,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 400 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 07:27:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-11-20 07:27:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 85 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 07:27:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-11-20 07:27:30,168 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 44 [2021-11-20 07:27:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-11-20 07:27:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-11-20 07:27:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:27:30,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:30,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:30,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:27:30,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 131738240, now seen corresponding path program 1 times [2021-11-20 07:27:30,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:30,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970528400] [2021-11-20 07:27:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:30,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970528400] [2021-11-20 07:27:30,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970528400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:30,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:30,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:27:30,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866506495] [2021-11-20 07:27:30,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:30,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:27:30,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:27:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:30,236 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:30,357 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-20 07:27:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:27:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-20 07:27:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:30,359 INFO L225 Difference]: With dead ends: 127 [2021-11-20 07:27:30,359 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 07:27:30,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:27:30,360 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:30,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 238 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:27:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 07:27:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-11-20 07:27:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 83 states have internal predecessors, (91), 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 07:27:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-11-20 07:27:30,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 44 [2021-11-20 07:27:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:30,364 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-11-20 07:27:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:27:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-11-20 07:27:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:27:30,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:30,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:30,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:27:30,366 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash 614432594, now seen corresponding path program 1 times [2021-11-20 07:27:30,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:30,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682934113] [2021-11-20 07:27:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:27:30,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:30,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682934113] [2021-11-20 07:27:30,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682934113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:30,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992812734] [2021-11-20 07:27:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:30,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:30,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:27:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:27:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:31,229 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 21 treesize of output 13 [2021-11-20 07:27:33,330 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| 0) .cse0 (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) .cse0))))))) is different from true [2021-11-20 07:27:33,399 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:27:33,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 29 [2021-11-20 07:27:33,490 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:33,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-11-20 07:27:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-20 07:27:33,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:35,680 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.offset_20| Int) (|v_node_create_~temp~0#1.base_23| Int) (v_DerPreprocessor_3 Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_23| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_23|) |v_node_create_~temp~0#1.offset_20| 0) (+ |v_node_create_~temp~0#1.offset_20| 4) v_DerPreprocessor_3)) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (<= 1 .cse0) (<= (+ .cse0 1) 0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_23|)))) is different from false [2021-11-20 07:27:35,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992812734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:35,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:35,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-20 07:27:35,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750188857] [2021-11-20 07:27:35,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:35,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:27:35,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:27:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=620, Unknown=2, NotChecked=102, Total=812 [2021-11-20 07:27:35,684 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 27 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:43,642 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-20 07:27:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:27:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-11-20 07:27:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:43,644 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:27:43,644 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:27:43,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=151, Invalid=1044, Unknown=3, NotChecked=134, Total=1332 [2021-11-20 07:27:43,645 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 21 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:43,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 892 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 361 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2021-11-20 07:27:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:27:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-20 07:27:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 75 states have internal predecessors, (81), 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 07:27:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-20 07:27:43,649 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 46 [2021-11-20 07:27:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-20 07:27:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-20 07:27:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:27:43,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:43,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:43,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:43,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2046450120, now seen corresponding path program 1 times [2021-11-20 07:27:43,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:43,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596350786] [2021-11-20 07:27:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:43,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:27:44,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596350786] [2021-11-20 07:27:44,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596350786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934018240] [2021-11-20 07:27:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:44,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:44,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:44,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:27:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 07:27:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:44,987 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 07:27:45,279 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:27:45,279 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 11 treesize of output 11 [2021-11-20 07:27:45,412 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 07:27:45,608 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:27:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-20 07:27:45,942 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-20 07:27:45,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 38 [2021-11-20 07:27:45,948 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 25 [2021-11-20 07:27:48,488 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-20 07:27:48,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 125 treesize of output 97 [2021-11-20 07:27:48,521 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:27:48,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 98 [2021-11-20 07:27:48,556 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-20 07:27:48,556 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 5 case distinctions, treesize of input 95 treesize of output 118 [2021-11-20 07:27:48,922 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 111 [2021-11-20 07:27:49,836 INFO L354 Elim1Store]: treesize reduction 105, result has 7.1 percent of original size [2021-11-20 07:27:49,836 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 61 [2021-11-20 07:27:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:27:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:50,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934018240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:50,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:50,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2021-11-20 07:27:50,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716391956] [2021-11-20 07:27:50,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:50,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:27:50,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:27:50,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2577, Unknown=1, NotChecked=0, Total=2756 [2021-11-20 07:27:50,583 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 49 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:27:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:56,256 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-11-20 07:27:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:27:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2021-11-20 07:27:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:56,261 INFO L225 Difference]: With dead ends: 102 [2021-11-20 07:27:56,261 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 07:27:56,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=293, Invalid=4260, Unknown=3, NotChecked=0, Total=4556 [2021-11-20 07:27:56,263 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:56,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1335 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 847 Invalid, 0 Unknown, 293 Unchecked, 0.7s Time] [2021-11-20 07:27:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 07:27:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-11-20 07:27:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 93 states have internal predecessors, (102), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:27:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-11-20 07:27:56,280 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 46 [2021-11-20 07:27:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:56,280 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-11-20 07:27:56,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:27:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-11-20 07:27:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 07:27:56,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:56,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:27:56,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 07:27:56,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:56,482 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:27:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2046450121, now seen corresponding path program 1 times [2021-11-20 07:27:56,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:56,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046086348] [2021-11-20 07:27:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:56,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:57,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:57,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:27:57,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:57,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046086348] [2021-11-20 07:27:57,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046086348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093505918] [2021-11-20 07:27:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:57,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:57,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:57,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:27:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-20 07:27:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:58,150 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 07:27:58,745 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:27:58,746 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 11 treesize of output 11 [2021-11-20 07:27:58,755 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 14 treesize of output 16 [2021-11-20 07:27:58,971 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 07:27:58,980 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 22 treesize of output 18 [2021-11-20 07:27:59,299 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:27:59,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 56 [2021-11-20 07:27:59,315 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:27:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2021-11-20 07:27:59,808 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-20 07:27:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 68 [2021-11-20 07:27:59,819 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:27:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 43 [2021-11-20 07:28:12,080 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-20 07:28:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 183 treesize of output 127 [2021-11-20 07:28:12,136 INFO L354 Elim1Store]: treesize reduction 292, result has 10.2 percent of original size [2021-11-20 07:28:12,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 139 treesize of output 125 [2021-11-20 07:28:12,156 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 07:28:12,157 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 124 treesize of output 129 [2021-11-20 07:28:12,172 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-20 07:28:12,172 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 123 treesize of output 125 [2021-11-20 07:28:14,440 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-20 07:28:14,440 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 103 [2021-11-20 07:28:14,474 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-11-20 07:28:14,474 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 82 treesize of output 60 [2021-11-20 07:28:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093505918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:15,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:28:15,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2021-11-20 07:28:15,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295211609] [2021-11-20 07:28:15,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:15,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:28:15,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:28:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3227, Unknown=6, NotChecked=0, Total=3422 [2021-11-20 07:28:15,668 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 52 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:28:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:26,423 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-11-20 07:28:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:28:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2021-11-20 07:28:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:26,424 INFO L225 Difference]: With dead ends: 102 [2021-11-20 07:28:26,424 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 07:28:26,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=332, Invalid=5512, Unknown=8, NotChecked=0, Total=5852 [2021-11-20 07:28:26,427 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:26,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1228 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 735 Invalid, 0 Unknown, 285 Unchecked, 0.6s Time] [2021-11-20 07:28:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 07:28:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-11-20 07:28:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 92 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:28:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-11-20 07:28:26,441 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 46 [2021-11-20 07:28:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:26,441 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-11-20 07:28:26,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:28:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-11-20 07:28:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:28:26,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:26,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-20 07:28:26,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:26,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:28:26,645 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:28:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash 865523061, now seen corresponding path program 1 times [2021-11-20 07:28:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131531189] [2021-11-20 07:28:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:26,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:28:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:28:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:28:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:28:27,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131531189] [2021-11-20 07:28:27,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131531189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:27,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757447900] [2021-11-20 07:28:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:27,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:27,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:27,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:28:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:28:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:28,015 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 22 treesize of output 14 [2021-11-20 07:28:28,020 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 07:28:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:32,890 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:28:32,890 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 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-20 07:28:32,902 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:28:32,903 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 07:28:33,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:33,542 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-20 07:28:33,542 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 45 treesize of output 46 [2021-11-20 07:28:33,787 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:28:33,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 86 [2021-11-20 07:28:33,965 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 26 treesize of output 14 [2021-11-20 07:28:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:33,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:28:33,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757447900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:33,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:28:33,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 42 [2021-11-20 07:28:33,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987242567] [2021-11-20 07:28:33,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:33,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:28:33,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:28:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1685, Unknown=1, NotChecked=0, Total=1806 [2021-11-20 07:28:33,976 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:28:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:34,402 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2021-11-20 07:28:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:28:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-11-20 07:28:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:34,406 INFO L225 Difference]: With dead ends: 153 [2021-11-20 07:28:34,406 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 07:28:34,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=156, Invalid=2099, Unknown=1, NotChecked=0, Total=2256 [2021-11-20 07:28:34,407 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:34,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 656 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 401 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2021-11-20 07:28:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 07:28:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2021-11-20 07:28:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 103 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:28:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-11-20 07:28:34,412 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 51 [2021-11-20 07:28:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:34,412 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-11-20 07:28:34,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:28:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-11-20 07:28:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:28:34,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:34,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-20 07:28:34,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:34,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 07:28:34,614 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:28:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 865523062, now seen corresponding path program 1 times [2021-11-20 07:28:34,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276267632] [2021-11-20 07:28:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:34,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:28:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:28:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:28:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:28:35,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:35,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276267632] [2021-11-20 07:28:35,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276267632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:35,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307252886] [2021-11-20 07:28:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:35,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:28:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:35,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:28:35,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:28:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 07:28:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:35,881 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 07:28:36,173 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:28:36,173 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 11 treesize of output 11 [2021-11-20 07:28:36,285 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 07:28:36,452 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:28:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-20 07:28:36,785 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-20 07:28:36,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 33 [2021-11-20 07:28:36,791 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 20 treesize of output 18 [2021-11-20 07:28:36,795 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 11 treesize of output 7 [2021-11-20 07:28:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:43,252 INFO L354 Elim1Store]: treesize reduction 173, result has 18.4 percent of original size [2021-11-20 07:28:43,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 98 [2021-11-20 07:28:43,263 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:28:43,263 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 119 treesize of output 119 [2021-11-20 07:28:43,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:43,282 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:28:43,282 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 1 case distinctions, treesize of input 113 treesize of output 101 [2021-11-20 07:28:43,732 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:28:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 61 [2021-11-20 07:28:44,262 INFO L354 Elim1Store]: treesize reduction 52, result has 24.6 percent of original size [2021-11-20 07:28:44,262 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 86 treesize of output 52 [2021-11-20 07:28:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:44,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307252886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:44,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:28:44,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 50 [2021-11-20 07:28:44,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687103593] [2021-11-20 07:28:44,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:44,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:28:44,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:28:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2808, Unknown=2, NotChecked=0, Total=2970 [2021-11-20 07:28:44,898 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 50 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 42 states have internal predecessors, (89), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:28:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:58,959 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2021-11-20 07:28:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:28:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 42 states have internal predecessors, (89), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-11-20 07:28:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:28:58,961 INFO L225 Difference]: With dead ends: 158 [2021-11-20 07:28:58,961 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 07:28:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=323, Invalid=5217, Unknown=10, NotChecked=0, Total=5550 [2021-11-20 07:28:58,964 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 95 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:28:58,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 2204 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1103 Invalid, 0 Unknown, 350 Unchecked, 0.8s Time] [2021-11-20 07:28:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 07:28:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2021-11-20 07:28:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 105 states have internal predecessors, (114), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:28:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2021-11-20 07:28:58,969 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 51 [2021-11-20 07:28:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:28:58,970 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2021-11-20 07:28:58,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 42 states have internal predecessors, (89), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:28:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2021-11-20 07:28:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:28:58,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:28:58,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:28:59,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:59,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:28:59,172 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:28:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash -396596539, now seen corresponding path program 2 times [2021-11-20 07:28:59,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:59,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965884307] [2021-11-20 07:28:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:59,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:59,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:28:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:28:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:59,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:28:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:29:00,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:00,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965884307] [2021-11-20 07:29:00,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965884307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:00,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144263077] [2021-11-20 07:29:00,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:00,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:00,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:00,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:00,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:29:00,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 07:29:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:00,359 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 07:29:00,759 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:29:00,759 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 17 treesize of output 21 [2021-11-20 07:29:00,919 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 07:29:00,927 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 07:29:01,125 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:29:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-20 07:29:01,135 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:29:01,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-20 07:29:01,427 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 07:29:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 56 [2021-11-20 07:29:01,440 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-20 07:29:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2021-11-20 07:29:01,446 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:29:01,447 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 36 treesize of output 32 [2021-11-20 07:29:09,470 INFO L354 Elim1Store]: treesize reduction 356, result has 10.3 percent of original size [2021-11-20 07:29:09,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 157 treesize of output 139 [2021-11-20 07:29:09,519 INFO L354 Elim1Store]: treesize reduction 248, result has 10.5 percent of original size [2021-11-20 07:29:09,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 142 treesize of output 94 [2021-11-20 07:29:09,534 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:29:09,534 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 127 treesize of output 129 [2021-11-20 07:29:10,769 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-11-20 07:29:10,769 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 166 treesize of output 112 [2021-11-20 07:29:11,511 INFO L354 Elim1Store]: treesize reduction 142, result has 7.2 percent of original size [2021-11-20 07:29:11,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 57 [2021-11-20 07:29:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:11,622 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-20 07:29:11,622 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 24 treesize of output 23 [2021-11-20 07:29:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144263077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:12,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-11-20 07:29:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585794488] [2021-11-20 07:29:12,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:29:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:29:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3101, Unknown=4, NotChecked=0, Total=3306 [2021-11-20 07:29:12,046 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 53 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 46 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:29:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:23,956 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2021-11-20 07:29:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:29:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 46 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-11-20 07:29:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:23,958 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:29:23,958 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:29:23,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=321, Invalid=4501, Unknown=8, NotChecked=0, Total=4830 [2021-11-20 07:29:23,960 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 36 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:23,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1513 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1054 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2021-11-20 07:29:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:29:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-11-20 07:29:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 110 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:29:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-11-20 07:29:23,964 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 51 [2021-11-20 07:29:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:23,965 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-11-20 07:29:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 46 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:29:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-11-20 07:29:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:29:23,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:23,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:29:23,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 07:29:24,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:24,181 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:29:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -396596538, now seen corresponding path program 2 times [2021-11-20 07:29:24,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:24,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308634949] [2021-11-20 07:29:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:24,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:29:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:29:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:29:25,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:25,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308634949] [2021-11-20 07:29:25,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308634949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784683724] [2021-11-20 07:29:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:25,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:25,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:25,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:29:25,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 07:29:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:25,597 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 07:29:25,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:29:25,926 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 11 treesize of output 11 [2021-11-20 07:29:26,073 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 07:29:26,082 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 07:29:26,294 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:29:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2021-11-20 07:29:26,305 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:29:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 50 [2021-11-20 07:29:26,615 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-20 07:29:26,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 56 [2021-11-20 07:29:26,624 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:29:26,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2021-11-20 07:29:32,550 INFO L354 Elim1Store]: treesize reduction 364, result has 10.1 percent of original size [2021-11-20 07:29:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 150 treesize of output 139 [2021-11-20 07:29:32,601 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-20 07:29:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 135 treesize of output 94 [2021-11-20 07:29:32,622 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:29:32,622 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 120 treesize of output 122 [2021-11-20 07:29:33,828 INFO L354 Elim1Store]: treesize reduction 182, result has 5.7 percent of original size [2021-11-20 07:29:33,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 189 treesize of output 114 [2021-11-20 07:29:33,863 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-11-20 07:29:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 55 [2021-11-20 07:29:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:33,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:34,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784683724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:34,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:34,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2021-11-20 07:29:34,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906207238] [2021-11-20 07:29:34,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:29:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:29:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3824, Unknown=3, NotChecked=0, Total=4032 [2021-11-20 07:29:34,820 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 55 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 48 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:29:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:48,928 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-11-20 07:29:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:29:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 48 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-11-20 07:29:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:48,930 INFO L225 Difference]: With dead ends: 115 [2021-11-20 07:29:48,930 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 07:29:48,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=390, Invalid=6575, Unknown=7, NotChecked=0, Total=6972 [2021-11-20 07:29:48,932 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 35 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1365 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 765 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2021-11-20 07:29:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 07:29:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-11-20 07:29:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 107 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:29:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-20 07:29:48,937 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 51 [2021-11-20 07:29:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:48,938 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-20 07:29:48,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 48 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:29:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-20 07:29:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:29:48,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:48,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:48,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 07:29:49,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:29:49,152 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:29:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1874385560, now seen corresponding path program 1 times [2021-11-20 07:29:49,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:49,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042900140] [2021-11-20 07:29:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:49,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:49,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:29:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:50,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:29:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:29:50,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042900140] [2021-11-20 07:29:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042900140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605756305] [2021-11-20 07:29:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:50,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:50,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:50,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:29:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 07:29:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:51,093 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 13 treesize of output 9 [2021-11-20 07:29:56,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:29:56,226 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:29:56,226 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 1 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 07:29:56,237 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:29:56,237 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 23 treesize of output 25 [2021-11-20 07:29:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:29:56,847 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-20 07:29:56,847 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 2 case distinctions, treesize of input 28 treesize of output 46 [2021-11-20 07:29:57,095 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:29:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2021-11-20 07:29:57,533 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 27 treesize of output 19 [2021-11-20 07:29:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:29:57,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:00,206 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.offset_38| Int) (v_DerPreprocessor_14 Int) (|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.base| Int) (|v_node_create_~temp~0#1.base_41| Int)) (let ((.cse0 (store |c_#valid| |v_node_create_~temp~0#1.base_41| 1)) (.cse1 (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_41|) |v_node_create_~temp~0#1.offset_38| 0) (+ |v_node_create_~temp~0#1.offset_38| 4) v_DerPreprocessor_14))) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_41|) (not (= (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_41| .cse1) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) 1)) (= (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_41| (store .cse1 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)))) is different from false [2021-11-20 07:30:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605756305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:00,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:00,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 50 [2021-11-20 07:30:00,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242982612] [2021-11-20 07:30:00,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 07:30:00,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 07:30:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2868, Unknown=3, NotChecked=108, Total=3192 [2021-11-20 07:30:00,211 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 51 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:30:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:10,494 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-11-20 07:30:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:30:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2021-11-20 07:30:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:10,496 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:30:10,496 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:30:10,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=424, Invalid=5735, Unknown=7, NotChecked=154, Total=6320 [2021-11-20 07:30:10,498 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 65 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:10,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1405 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1058 Invalid, 0 Unknown, 254 Unchecked, 0.6s Time] [2021-11-20 07:30:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:30:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2021-11-20 07:30:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 108 states have internal predecessors, (118), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:30:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-11-20 07:30:10,503 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 56 [2021-11-20 07:30:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:10,503 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-11-20 07:30:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:30:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-11-20 07:30:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:30:10,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:10,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:10,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:10,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:10,729 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:30:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1874385561, now seen corresponding path program 1 times [2021-11-20 07:30:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203316316] [2021-11-20 07:30:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:10,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:11,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:11,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:30:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:30:12,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203316316] [2021-11-20 07:30:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203316316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057504382] [2021-11-20 07:30:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:12,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:12,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:12,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:30:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 07:30:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:12,584 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 07:30:13,133 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 07:30:13,137 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 11 treesize of output 7 [2021-11-20 07:30:13,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:13,654 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:30:13,654 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 1 case distinctions, treesize of input 87 treesize of output 71 [2021-11-20 07:30:13,666 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:30:13,666 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 72 treesize of output 74 [2021-11-20 07:30:13,675 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:30:13,675 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 71 treesize of output 71 [2021-11-20 07:30:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:13,686 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:30:13,687 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 1 case distinctions, treesize of input 65 treesize of output 53 [2021-11-20 07:30:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:14,561 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-20 07:30:14,562 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 2 case distinctions, treesize of input 67 treesize of output 81 [2021-11-20 07:30:14,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:14,620 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-20 07:30:14,620 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 2 case distinctions, treesize of input 78 treesize of output 96 [2021-11-20 07:30:16,995 INFO L354 Elim1Store]: treesize reduction 107, result has 26.7 percent of original size [2021-11-20 07:30:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 156 [2021-11-20 07:30:17,054 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-20 07:30:17,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 139 [2021-11-20 07:30:18,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:30:18,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 97 [2021-11-20 07:30:18,843 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:30:18,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 78 [2021-11-20 07:30:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:19,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:29,986 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:30:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057504382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:32,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23] total 54 [2021-11-20 07:30:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555365977] [2021-11-20 07:30:32,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:32,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:30:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:30:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3566, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 07:30:32,152 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 55 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 48 states have internal predecessors, (97), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:30:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:36,907 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-11-20 07:30:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:30:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 48 states have internal predecessors, (97), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2021-11-20 07:30:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:36,909 INFO L225 Difference]: With dead ends: 119 [2021-11-20 07:30:36,909 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 07:30:36,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=453, Invalid=6857, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 07:30:36,911 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 78 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:36,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1286 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1028 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2021-11-20 07:30:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 07:30:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-11-20 07:30:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 108 states have internal predecessors, (117), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:30:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-11-20 07:30:36,916 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 56 [2021-11-20 07:30:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:36,916 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-11-20 07:30:36,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 48 states have internal predecessors, (97), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:30:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-11-20 07:30:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:30:36,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:36,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-11-20 07:30:36,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-20 07:30:37,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:30:37,130 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:30:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1773529958, now seen corresponding path program 3 times [2021-11-20 07:30:37,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859102062] [2021-11-20 07:30:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:37,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:37,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:37,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:30:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 07:30:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 07:30:37,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859102062] [2021-11-20 07:30:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859102062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301267545] [2021-11-20 07:30:37,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:37,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:37,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:30:37,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:30:37,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:30:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:30:37,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:30:37,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301267545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:30:37,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:30:37,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-11-20 07:30:37,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682473958] [2021-11-20 07:30:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:30:37,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:30:37,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:30:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:30:37,486 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:30:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:37,498 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-20 07:30:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:30:37,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-20 07:30:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:37,500 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:30:37,500 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:30:37,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:30:37,501 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:37,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 103 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:30:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:30:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-20 07:30:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 76 states have internal predecessors, (80), 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 07:30:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-11-20 07:30:37,507 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 58 [2021-11-20 07:30:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:37,507 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-11-20 07:30:37,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:30:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-11-20 07:30:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:30:37,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:37,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:37,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:30:37,731 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:30:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1693228282, now seen corresponding path program 1 times [2021-11-20 07:30:37,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:37,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509986648] [2021-11-20 07:30:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:37,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:38,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:30:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:30:39,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509986648] [2021-11-20 07:30:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509986648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284829910] [2021-11-20 07:30:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:39,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:39,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:39,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:30:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 07:30:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:39,524 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 07:30:39,722 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 11 treesize of output 9 [2021-11-20 07:30:39,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:30:39,897 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 11 treesize of output 11 [2021-11-20 07:30:40,053 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 07:30:40,274 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:30:40,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-20 07:30:40,675 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-11-20 07:30:40,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 45 [2021-11-20 07:30:40,679 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 27 treesize of output 19 [2021-11-20 07:30:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,085 INFO L354 Elim1Store]: treesize reduction 213, result has 16.8 percent of original size [2021-11-20 07:30:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 114 [2021-11-20 07:30:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:51,109 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:30:51,109 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 1 case distinctions, treesize of input 159 treesize of output 123 [2021-11-20 07:30:51,129 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:30:51,129 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 144 treesize of output 144 [2021-11-20 07:30:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:30:52,292 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-11-20 07:30:52,292 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 5 case distinctions, treesize of input 114 treesize of output 56 [2021-11-20 07:30:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:52,678 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-20 07:30:52,678 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 2 case distinctions, treesize of input 38 treesize of output 44 [2021-11-20 07:30:52,918 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:30:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 79 [2021-11-20 07:30:53,168 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 22 treesize of output 10 [2021-11-20 07:30:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:53,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:53,409 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 7 treesize of output 5 [2021-11-20 07:31:29,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (<= 0 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_#t~mem14#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_#t~mem14#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-11-20 07:32:29,926 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_27| Int)) (<= 0 (select (select (let ((.cse0 (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_27| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|))))) (store .cse0 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-11-20 07:32:31,732 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_27| Int)) (<= 0 (select (select (let ((.cse0 (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_27| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|))))) (store .cse0 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-11-20 07:32:32,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284829910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:32,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:32:32,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 61 [2021-11-20 07:32:32,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344969428] [2021-11-20 07:32:32,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:32,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 07:32:32,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 07:32:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4382, Unknown=50, NotChecked=408, Total=5112 [2021-11-20 07:32:32,166 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 62 states, 57 states have (on average 1.736842105263158) internal successors, (99), 53 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:32:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:49,442 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-11-20 07:32:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:32:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 57 states have (on average 1.736842105263158) internal successors, (99), 53 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-11-20 07:32:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:49,444 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:32:49,444 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 07:32:49,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 128.6s TimeCoverageRelationStatistics Valid=433, Invalid=7181, Unknown=54, NotChecked=522, Total=8190 [2021-11-20 07:32:49,446 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:49,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1607 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 875 Invalid, 0 Unknown, 162 Unchecked, 0.6s Time] [2021-11-20 07:32:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 07:32:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-20 07:32:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.296875) internal successors, (83), 78 states have internal predecessors, (83), 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 07:32:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-20 07:32:49,452 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 58 [2021-11-20 07:32:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:49,453 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-20 07:32:49,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 57 states have (on average 1.736842105263158) internal successors, (99), 53 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:32:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-20 07:32:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:32:49,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:49,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:49,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:32:49,662 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:32:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1693228283, now seen corresponding path program 1 times [2021-11-20 07:32:49,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:49,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545513056] [2021-11-20 07:32:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:49,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:50,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:32:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:32:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:51,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:32:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:32:52,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545513056] [2021-11-20 07:32:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545513056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91599256] [2021-11-20 07:32:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:52,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:52,052 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:52,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:32:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-20 07:32:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:52,164 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 07:32:52,254 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 07:32:52,317 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 07:32:52,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:32:52,557 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 14 [2021-11-20 07:32:52,831 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 22 treesize of output 20 [2021-11-20 07:32:52,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:32:52,837 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 07:32:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:32:53,246 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:32:53,247 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 11 treesize of output 11 [2021-11-20 07:32:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:32:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:32:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 07:32:53,508 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 07:32:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:32:53,515 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 25 treesize of output 13 [2021-11-20 07:32:53,916 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:32:53,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 54 [2021-11-20 07:32:53,931 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-20 07:32:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 48 [2021-11-20 07:32:54,541 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:32:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 57 [2021-11-20 07:32:54,546 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 44 [2021-11-20 07:32:54,550 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 41 treesize of output 37 [2021-11-20 07:32:54,558 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:32:54,558 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 34 treesize of output 28 [2021-11-20 07:32:54,563 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 07:33:09,220 INFO L354 Elim1Store]: treesize reduction 108, result has 15.0 percent of original size [2021-11-20 07:33:09,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 186 [2021-11-20 07:33:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:09,321 INFO L354 Elim1Store]: treesize reduction 173, result has 18.4 percent of original size [2021-11-20 07:33:09,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 136 [2021-11-20 07:33:09,336 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:33:09,336 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 185 treesize of output 185 [2021-11-20 07:33:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:09,354 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:33:09,355 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 1 case distinctions, treesize of input 179 treesize of output 167 [2021-11-20 07:33:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:09,385 INFO L354 Elim1Store]: treesize reduction 112, result has 17.0 percent of original size [2021-11-20 07:33:09,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 164 treesize of output 172 [2021-11-20 07:33:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:33:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:11,961 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 07:33:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-11-20 07:33:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:12,513 INFO L354 Elim1Store]: treesize reduction 228, result has 20.8 percent of original size [2021-11-20 07:33:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 309 treesize of output 208 [2021-11-20 07:33:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:12,567 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-20 07:33:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 179 [2021-11-20 07:33:12,584 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 07:33:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 167 [2021-11-20 07:33:13,598 INFO L354 Elim1Store]: treesize reduction 132, result has 28.6 percent of original size [2021-11-20 07:33:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 531 treesize of output 222 [2021-11-20 07:33:13,723 INFO L354 Elim1Store]: treesize reduction 188, result has 30.1 percent of original size [2021-11-20 07:33:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 362 treesize of output 280 [2021-11-20 07:33:13,754 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-20 07:33:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 321 [2021-11-20 07:33:14,114 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:33:14,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 56 [2021-11-20 07:33:14,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:33:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-11-20 07:33:14,323 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 07:33:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:33:14,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91599256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:57,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:57,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 69 [2021-11-20 07:34:57,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088142690] [2021-11-20 07:34:57,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 07:34:57,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 07:34:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=6140, Unknown=33, NotChecked=0, Total=6480 [2021-11-20 07:34:57,883 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:35:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:15,016 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-20 07:35:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:35:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-11-20 07:35:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:15,018 INFO L225 Difference]: With dead ends: 84 [2021-11-20 07:35:15,018 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 07:35:15,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 139.2s TimeCoverageRelationStatistics Valid=435, Invalid=8649, Unknown=36, NotChecked=0, Total=9120 [2021-11-20 07:35:15,020 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:15,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1528 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1035 Invalid, 0 Unknown, 137 Unchecked, 0.7s Time] [2021-11-20 07:35:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 07:35:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-20 07:35:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.28125) internal successors, (82), 78 states have internal predecessors, (82), 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 07:35:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-20 07:35:15,024 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 58 [2021-11-20 07:35:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:15,024 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-20 07:35:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:35:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-20 07:35:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:35:15,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:15,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:15,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-20 07:35:15,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:15,241 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:35:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1290478905, now seen corresponding path program 1 times [2021-11-20 07:35:15,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:15,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786842214] [2021-11-20 07:35:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:15,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:16,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:35:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:35:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:35:16,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786842214] [2021-11-20 07:35:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786842214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146546167] [2021-11-20 07:35:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:16,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:16,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:16,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:35:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-20 07:35:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:17,070 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 07:35:17,261 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 11 treesize of output 9 [2021-11-20 07:35:17,422 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:35:17,422 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 11 treesize of output 11 [2021-11-20 07:35:17,563 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 07:35:17,771 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:35:17,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-20 07:35:18,123 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-20 07:35:18,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 38 [2021-11-20 07:35:18,127 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 16 [2021-11-20 07:35:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:28,571 INFO L354 Elim1Store]: treesize reduction 173, result has 18.4 percent of original size [2021-11-20 07:35:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 103 [2021-11-20 07:35:28,581 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:35:28,582 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 132 treesize of output 132 [2021-11-20 07:35:28,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:28,594 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:35:28,594 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 1 case distinctions, treesize of input 126 treesize of output 114 [2021-11-20 07:35:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:30,400 INFO L354 Elim1Store]: treesize reduction 232, result has 20.5 percent of original size [2021-11-20 07:35:30,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 177 treesize of output 132 [2021-11-20 07:35:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:30,430 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-20 07:35:30,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 138 [2021-11-20 07:35:31,768 INFO L354 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2021-11-20 07:35:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 368 treesize of output 156 [2021-11-20 07:35:31,829 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:35:31,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 261 treesize of output 244 [2021-11-20 07:35:34,565 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:35:34,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 146 [2021-11-20 07:35:36,676 INFO L354 Elim1Store]: treesize reduction 89, result has 18.3 percent of original size [2021-11-20 07:35:36,677 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 70 [2021-11-20 07:35:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:36,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:42,299 INFO L354 Elim1Store]: treesize reduction 18, result has 92.5 percent of original size [2021-11-20 07:35:42,299 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 126 treesize of output 234 [2021-11-20 07:38:58,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_#t~mem11#1.base|) |c_ULTIMATE.start_sll_circular_append_#t~mem11#1.offset|))) (let ((.cse0 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)))) (store .cse4 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| .cse0) (= .cse1 .cse0))))) is different from false [2021-11-20 07:39:00,093 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (let ((.cse0 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)))) (store .cse4 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= .cse0 |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) (= .cse0 .cse1))))) is different from false [2021-11-20 07:39:02,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (|ULTIMATE.start_sll_circular_append_#t~mem15#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (let ((.cse0 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)))) (store .cse3 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| (select (select .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_32| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)))) (store .cse4 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|) |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| |ULTIMATE.start_sll_circular_append_#t~mem15#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (or (= .cse0 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|) (= .cse0 .cse1))))) is different from false [2021-11-20 07:39:02,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146546167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:02,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:39:02,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 64 [2021-11-20 07:39:02,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357695334] [2021-11-20 07:39:02,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:02,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 07:39:02,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 07:39:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4780, Unknown=96, NotChecked=426, Total=5550 [2021-11-20 07:39:02,622 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:39:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:22,269 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-11-20 07:39:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:39:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 62 [2021-11-20 07:39:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:22,270 INFO L225 Difference]: With dead ends: 116 [2021-11-20 07:39:22,270 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:39:22,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 238.2s TimeCoverageRelationStatistics Valid=324, Invalid=6227, Unknown=103, NotChecked=486, Total=7140 [2021-11-20 07:39:22,271 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 46 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:22,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1308 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1086 Invalid, 0 Unknown, 296 Unchecked, 0.8s Time] [2021-11-20 07:39:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:39:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-11-20 07:39:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 82 states have internal predecessors, (88), 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 07:39:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-11-20 07:39:22,275 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 62 [2021-11-20 07:39:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:22,275 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-11-20 07:39:22,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:39:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-11-20 07:39:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:39:22,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:22,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:22,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:22,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:22,501 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-20 07:39:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1290478904, now seen corresponding path program 1 times [2021-11-20 07:39:22,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403547423] [2021-11-20 07:39:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:23,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:39:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:39:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:39:24,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:24,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403547423] [2021-11-20 07:39:24,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403547423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748845221] [2021-11-20 07:39:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:24,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:24,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:24,838 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:24,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c4e9d1-c2b6-48bd-9986-204a3bbc7af2/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:39:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-20 07:39:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:24,959 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 07:39:24,965 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 07:39:25,073 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 14 treesize of output 12 [2021-11-20 07:39:25,077 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 07:39:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:25,471 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 14 [2021-11-20 07:39:25,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:25,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-20 07:39:25,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:39:25,775 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 07:39:25,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:39:25,779 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 07:39:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:26,007 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:39:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 07:39:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:26,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:26,032 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:39:26,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-11-20 07:39:26,286 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 11 [2021-11-20 07:39:26,301 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 07:39:26,636 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:39:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2021-11-20 07:39:26,649 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:39:26,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2021-11-20 07:39:27,268 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:39:27,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 68 [2021-11-20 07:39:27,278 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:39:27,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 43 [2021-11-20 07:39:27,285 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:39:27,285 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 34 treesize of output 28 [2021-11-20 07:39:27,289 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 07:39:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:44,164 INFO L354 Elim1Store]: treesize reduction 173, result has 18.4 percent of original size [2021-11-20 07:39:44,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 157 [2021-11-20 07:39:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:44,247 INFO L354 Elim1Store]: treesize reduction 265, result has 20.2 percent of original size [2021-11-20 07:39:44,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 237 [2021-11-20 07:39:44,261 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:39:44,262 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 231 treesize of output 231 [2021-11-20 07:39:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:44,291 INFO L354 Elim1Store]: treesize reduction 112, result has 17.0 percent of original size [2021-11-20 07:39:44,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 225 treesize of output 233 [2021-11-20 07:39:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:55,628 INFO L354 Elim1Store]: treesize reduction 236, result has 19.2 percent of original size [2021-11-20 07:39:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 332 treesize of output 234 [2021-11-20 07:39:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:55,716 INFO L354 Elim1Store]: treesize reduction 260, result has 14.5 percent of original size [2021-11-20 07:39:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 411 treesize of output 299 [2021-11-20 07:39:57,528 INFO L354 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2021-11-20 07:39:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 593 treesize of output 216 [2021-11-20 07:39:57,584 INFO L354 Elim1Store]: treesize reduction 184, result has 15.2 percent of original size [2021-11-20 07:39:57,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 355 treesize of output 239 [2021-11-20 07:40:01,387 INFO L354 Elim1Store]: treesize reduction 205, result has 19.0 percent of original size [2021-11-20 07:40:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 729 treesize of output 303 [2021-11-20 07:40:01,488 INFO L354 Elim1Store]: treesize reduction 141, result has 16.6 percent of original size [2021-11-20 07:40:01,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 283 treesize of output 191 [2021-11-20 07:40:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:40:02,438 INFO L328 TraceCheckSpWp]: Computing backward predicates...