./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b74df92940ca0e86c8c02c3eca1e89fb6c9c9c1248a25cd764acf39f7727180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:44:55,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:44:55,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:44:55,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:44:55,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:44:55,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:44:55,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:44:55,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:44:55,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:44:55,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:44:55,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:44:55,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:44:55,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:44:55,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:44:55,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:44:55,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:44:55,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:44:55,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:44:55,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:44:55,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:44:55,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:44:55,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:44:55,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:44:55,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:44:55,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:44:55,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:44:55,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:44:55,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:44:55,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:44:55,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:44:55,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:44:55,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:44:55,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:44:55,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:44:55,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:44:55,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:44:55,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:44:55,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:44:55,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:44:55,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:44:55,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:44:55,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-03 04:44:55,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:44:55,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:44:55,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:44:55,563 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:44:55,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:44:55,563 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:44:55,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:44:55,564 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:44:55,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:44:55,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:44:55,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:44:55,566 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:44:55,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:44:55,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:44:55,567 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:44:55,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:44:55,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:44:55,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:44:55,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:44:55,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:44:55,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:44:55,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:44:55,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:44:55,571 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:44:55,571 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:44:55,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:44:55,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:44:55,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:44:55,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:44:55,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:44:55,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:44:55,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:44:55,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:44:55,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:44:55,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:44:55,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:44:55,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:44:55,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:44:55,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b74df92940ca0e86c8c02c3eca1e89fb6c9c9c1248a25cd764acf39f7727180 [2021-11-03 04:44:55,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:44:55,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:44:55,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:44:55,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:44:55,818 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:44:55,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/forester-heap/dll-circular-1.i [2021-11-03 04:44:55,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/data/d437aa633/fa6b918f14394216aac94a86cac95e3d/FLAGa55e5a55a [2021-11-03 04:44:56,453 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:44:56,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i [2021-11-03 04:44:56,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/data/d437aa633/fa6b918f14394216aac94a86cac95e3d/FLAGa55e5a55a [2021-11-03 04:44:56,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/data/d437aa633/fa6b918f14394216aac94a86cac95e3d [2021-11-03 04:44:56,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:44:56,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:44:56,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:44:56,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:44:56,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:44:56,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:44:56" (1/1) ... [2021-11-03 04:44:56,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632c8626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:56, skipping insertion in model container [2021-11-03 04:44:56,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:44:56" (1/1) ... [2021-11-03 04:44:56,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:44:56,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:44:57,279 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22365,22378] [2021-11-03 04:44:57,285 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22471,22484] [2021-11-03 04:44:57,289 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22595,22608] [2021-11-03 04:44:57,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:44:57,312 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:44:57,357 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22365,22378] [2021-11-03 04:44:57,359 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22471,22484] [2021-11-03 04:44:57,368 WARN L228 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_e41318cb-d57f-4ba9-9303-385579089208/sv-benchmarks/c/forester-heap/dll-circular-1.i[22595,22608] [2021-11-03 04:44:57,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:44:57,407 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:44:57,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57 WrapperNode [2021-11-03 04:44:57,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:44:57,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:44:57,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:44:57,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:44:57,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:44:57,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:44:57,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:44:57,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:44:57,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:44:57,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:44:57,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:44:57,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:44:57,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (1/1) ... [2021-11-03 04:44:57,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:44:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:44:57,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:44:57,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:44:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 04:44:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 04:44:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:44:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:44:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:44:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:44:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:44:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:44:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:44:57,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:44:58,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:44:58,211 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-03 04:44:58,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:44:58 BoogieIcfgContainer [2021-11-03 04:44:58,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:44:58,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:44:58,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:44:58,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:44:58,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:44:56" (1/3) ... [2021-11-03 04:44:58,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b57a438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:44:58, skipping insertion in model container [2021-11-03 04:44:58,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:44:57" (2/3) ... [2021-11-03 04:44:58,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b57a438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:44:58, skipping insertion in model container [2021-11-03 04:44:58,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:44:58" (3/3) ... [2021-11-03 04:44:58,231 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2021-11-03 04:44:58,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:44:58,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2021-11-03 04:44:58,276 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:44:58,282 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 [2021-11-03 04:44:58,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2021-11-03 04:44:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 45 states have (on average 2.533333333333333) internal successors, (114), 95 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-03 04:44:58,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:58,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1] [2021-11-03 04:44:58,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash 7382, now seen corresponding path program 1 times [2021-11-03 04:44:58,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:58,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353504826] [2021-11-03 04:44:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:58,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:58,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:58,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353504826] [2021-11-03 04:44:58,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353504826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:58,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:58,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 04:44:58,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262128589] [2021-11-03 04:44:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:44:58,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:44:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:58,575 INFO L87 Difference]: Start difference. First operand has 96 states, 45 states have (on average 2.533333333333333) internal successors, (114), 95 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:58,739 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-11-03 04:44:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:44:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-11-03 04:44:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:58,749 INFO L225 Difference]: With dead ends: 102 [2021-11-03 04:44:58,760 INFO L226 Difference]: Without dead ends: 101 [2021-11-03 04:44:58,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-03 04:44:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-11-03 04:44:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 90 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-03 04:44:58,805 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 2 [2021-11-03 04:44:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:58,805 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-03 04:44:58,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-03 04:44:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-03 04:44:58,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:58,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1] [2021-11-03 04:44:58,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:44:58,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash 7383, now seen corresponding path program 1 times [2021-11-03 04:44:58,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:58,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514434968] [2021-11-03 04:44:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:58,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:58,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:58,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514434968] [2021-11-03 04:44:58,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514434968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:58,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:58,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 04:44:58,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704086337] [2021-11-03 04:44:58,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:44:58,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:44:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:58,896 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:58,969 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-11-03 04:44:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:44:58,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-11-03 04:44:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:58,971 INFO L225 Difference]: With dead ends: 99 [2021-11-03 04:44:58,971 INFO L226 Difference]: Without dead ends: 99 [2021-11-03 04:44:58,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-03 04:44:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-11-03 04:44:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 45 states have (on average 2.066666666666667) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-03 04:44:58,980 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 2 [2021-11-03 04:44:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:58,980 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-03 04:44:58,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-03 04:44:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:44:58,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:58,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:44:58,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:44:58,982 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1767036755, now seen corresponding path program 1 times [2021-11-03 04:44:58,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:58,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938718164] [2021-11-03 04:44:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:58,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:59,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:59,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938718164] [2021-11-03 04:44:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938718164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:59,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:59,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:44:59,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236416912] [2021-11-03 04:44:59,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:44:59,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:44:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:59,037 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:59,144 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-03 04:44:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:44:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:44:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:59,146 INFO L225 Difference]: With dead ends: 84 [2021-11-03 04:44:59,146 INFO L226 Difference]: Without dead ends: 84 [2021-11-03 04:44:59,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-03 04:44:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-11-03 04:44:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.8) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-11-03 04:44:59,153 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 6 [2021-11-03 04:44:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-11-03 04:44:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-11-03 04:44:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:44:59,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:59,155 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:44:59,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:44:59,155 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1767036754, now seen corresponding path program 1 times [2021-11-03 04:44:59,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:59,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855644361] [2021-11-03 04:44:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:59,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:59,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:59,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855644361] [2021-11-03 04:44:59,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855644361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:59,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:59,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:44:59,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584043403] [2021-11-03 04:44:59,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:44:59,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:44:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:59,279 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:59,402 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-03 04:44:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:44:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:44:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:59,404 INFO L225 Difference]: With dead ends: 96 [2021-11-03 04:44:59,404 INFO L226 Difference]: Without dead ends: 96 [2021-11-03 04:44:59,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-03 04:44:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-11-03 04:44:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.75) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-11-03 04:44:59,427 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 6 [2021-11-03 04:44:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:59,428 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-11-03 04:44:59,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-11-03 04:44:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:44:59,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:59,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:59,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:44:59,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1610054351, now seen corresponding path program 1 times [2021-11-03 04:44:59,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:59,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425219775] [2021-11-03 04:44:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:59,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:59,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:59,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425219775] [2021-11-03 04:44:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425219775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:59,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:44:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716642491] [2021-11-03 04:44:59,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:44:59,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:44:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:59,516 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:59,629 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-03 04:44:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:44:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:44:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:59,631 INFO L225 Difference]: With dead ends: 81 [2021-11-03 04:44:59,631 INFO L226 Difference]: Without dead ends: 81 [2021-11-03 04:44:59,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:44:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-03 04:44:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-03 04:44:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-11-03 04:44:59,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 8 [2021-11-03 04:44:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:59,648 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-11-03 04:44:59,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-11-03 04:44:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:44:59,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:59,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:59,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:44:59,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1610054350, now seen corresponding path program 1 times [2021-11-03 04:44:59,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:59,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791233870] [2021-11-03 04:44:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:59,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:59,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:44:59,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791233870] [2021-11-03 04:44:59,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791233870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:59,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:59,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:44:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665845627] [2021-11-03 04:44:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:44:59,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:44:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:44:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:59,787 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:59,918 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-03 04:44:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:44:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:44:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:59,920 INFO L225 Difference]: With dead ends: 80 [2021-11-03 04:44:59,920 INFO L226 Difference]: Without dead ends: 80 [2021-11-03 04:44:59,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:44:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-03 04:44:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-03 04:44:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-03 04:44:59,930 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 8 [2021-11-03 04:44:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:59,931 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-03 04:44:59,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-03 04:44:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:44:59,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:59,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:59,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:44:59,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:44:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1622353831, now seen corresponding path program 1 times [2021-11-03 04:44:59,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:44:59,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401600057] [2021-11-03 04:44:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:59,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:44:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:00,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:00,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401600057] [2021-11-03 04:45:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401600057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:00,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:00,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:45:00,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348367764] [2021-11-03 04:45:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:00,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:00,136 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:00,330 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2021-11-03 04:45:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:00,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:45:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:00,332 INFO L225 Difference]: With dead ends: 155 [2021-11-03 04:45:00,332 INFO L226 Difference]: Without dead ends: 155 [2021-11-03 04:45:00,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-03 04:45:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 82. [2021-11-03 04:45:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 81 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-11-03 04:45:00,337 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 9 [2021-11-03 04:45:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:00,337 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-11-03 04:45:00,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-11-03 04:45:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:45:00,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:00,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:00,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:45:00,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1246634621, now seen corresponding path program 1 times [2021-11-03 04:45:00,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:00,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548736772] [2021-11-03 04:45:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:00,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:00,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548736772] [2021-11-03 04:45:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548736772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:00,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:00,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:45:00,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76964776] [2021-11-03 04:45:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:00,450 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:00,642 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-11-03 04:45:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:45:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:00,643 INFO L225 Difference]: With dead ends: 117 [2021-11-03 04:45:00,643 INFO L226 Difference]: Without dead ends: 117 [2021-11-03 04:45:00,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-03 04:45:00,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-11-03 04:45:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 96 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2021-11-03 04:45:00,647 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 10 [2021-11-03 04:45:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:00,647 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2021-11-03 04:45:00,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2021-11-03 04:45:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:45:00,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:00,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:45:00,649 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1246634620, now seen corresponding path program 1 times [2021-11-03 04:45:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:00,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822293343] [2021-11-03 04:45:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:00,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:00,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:00,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822293343] [2021-11-03 04:45:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822293343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:00,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:00,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:45:00,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493815404] [2021-11-03 04:45:00,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:00,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:00,807 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:01,029 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-11-03 04:45:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:45:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:45:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:01,031 INFO L225 Difference]: With dead ends: 129 [2021-11-03 04:45:01,031 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 04:45:01,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:45:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 04:45:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2021-11-03 04:45:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.605263157894737) internal successors, (122), 103 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2021-11-03 04:45:01,034 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 10 [2021-11-03 04:45:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2021-11-03 04:45:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2021-11-03 04:45:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:45:01,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:01,035 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:01,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:45:01,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1073830216, now seen corresponding path program 1 times [2021-11-03 04:45:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:01,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577106043] [2021-11-03 04:45:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:01,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:01,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:01,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577106043] [2021-11-03 04:45:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577106043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:01,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:01,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 04:45:01,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823189862] [2021-11-03 04:45:01,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:01,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:01,114 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:01,343 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2021-11-03 04:45:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:45:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:45:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:01,344 INFO L225 Difference]: With dead ends: 114 [2021-11-03 04:45:01,344 INFO L226 Difference]: Without dead ends: 114 [2021-11-03 04:45:01,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:45:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-03 04:45:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 103. [2021-11-03 04:45:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.5921052631578947) internal successors, (121), 102 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-11-03 04:45:01,348 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 10 [2021-11-03 04:45:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:01,348 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-11-03 04:45:01,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-11-03 04:45:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:45:01,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:01,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:01,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:45:01,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1073830215, now seen corresponding path program 1 times [2021-11-03 04:45:01,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:01,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083283710] [2021-11-03 04:45:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:01,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:01,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:01,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083283710] [2021-11-03 04:45:01,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083283710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:01,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:01,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 04:45:01,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733335519] [2021-11-03 04:45:01,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:45:01,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:45:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:45:01,501 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:01,841 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2021-11-03 04:45:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:45:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:45:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:01,843 INFO L225 Difference]: With dead ends: 108 [2021-11-03 04:45:01,843 INFO L226 Difference]: Without dead ends: 108 [2021-11-03 04:45:01,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:45:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-03 04:45:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-11-03 04:45:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 92 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2021-11-03 04:45:01,846 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 10 [2021-11-03 04:45:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:01,846 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2021-11-03 04:45:01,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2021-11-03 04:45:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:45:01,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:01,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:01,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:45:01,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 90298837, now seen corresponding path program 1 times [2021-11-03 04:45:01,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:01,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914855164] [2021-11-03 04:45:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:01,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:01,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914855164] [2021-11-03 04:45:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914855164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:01,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:45:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192623271] [2021-11-03 04:45:01,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:01,979 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:02,223 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2021-11-03 04:45:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:45:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:45:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:02,225 INFO L225 Difference]: With dead ends: 123 [2021-11-03 04:45:02,225 INFO L226 Difference]: Without dead ends: 123 [2021-11-03 04:45:02,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:45:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-03 04:45:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-11-03 04:45:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 95 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-11-03 04:45:02,230 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 13 [2021-11-03 04:45:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:02,230 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-11-03 04:45:02,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-11-03 04:45:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:45:02,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:02,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:02,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:45:02,232 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 90298838, now seen corresponding path program 1 times [2021-11-03 04:45:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735407481] [2021-11-03 04:45:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:02,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:02,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:02,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735407481] [2021-11-03 04:45:02,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735407481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:02,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:02,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:45:02,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768001072] [2021-11-03 04:45:02,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:02,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:02,381 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:02,642 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2021-11-03 04:45:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:02,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:45:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:02,643 INFO L225 Difference]: With dead ends: 135 [2021-11-03 04:45:02,643 INFO L226 Difference]: Without dead ends: 135 [2021-11-03 04:45:02,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-03 04:45:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2021-11-03 04:45:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 95 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-03 04:45:02,647 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 13 [2021-11-03 04:45:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:02,647 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-03 04:45:02,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-03 04:45:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:45:02,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:02,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:02,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 04:45:02,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -939797720, now seen corresponding path program 1 times [2021-11-03 04:45:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:02,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714658883] [2021-11-03 04:45:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:02,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:02,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:02,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714658883] [2021-11-03 04:45:02,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714658883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:02,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:02,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 04:45:02,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693097821] [2021-11-03 04:45:02,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:45:02,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:45:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:45:02,744 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:03,004 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2021-11-03 04:45:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:45:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:03,005 INFO L225 Difference]: With dead ends: 126 [2021-11-03 04:45:03,006 INFO L226 Difference]: Without dead ends: 126 [2021-11-03 04:45:03,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:45:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-03 04:45:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-11-03 04:45:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.5058823529411764) internal successors, (128), 105 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2021-11-03 04:45:03,009 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 14 [2021-11-03 04:45:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:03,010 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2021-11-03 04:45:03,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2021-11-03 04:45:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:45:03,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:03,011 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:03,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 04:45:03,012 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1473390987, now seen corresponding path program 1 times [2021-11-03 04:45:03,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:03,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916848741] [2021-11-03 04:45:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:03,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:03,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916848741] [2021-11-03 04:45:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916848741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:03,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:03,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:45:03,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153215472] [2021-11-03 04:45:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:03,108 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:03,270 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2021-11-03 04:45:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:45:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:03,272 INFO L225 Difference]: With dead ends: 143 [2021-11-03 04:45:03,272 INFO L226 Difference]: Without dead ends: 143 [2021-11-03 04:45:03,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-03 04:45:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2021-11-03 04:45:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 88 states have (on average 1.5) internal successors, (132), 108 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-11-03 04:45:03,276 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 16 [2021-11-03 04:45:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-11-03 04:45:03,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-11-03 04:45:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:45:03,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:03,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 04:45:03,278 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1445707782, now seen corresponding path program 1 times [2021-11-03 04:45:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:03,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967686886] [2021-11-03 04:45:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:03,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:03,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:03,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967686886] [2021-11-03 04:45:03,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967686886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:03,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:03,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 04:45:03,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892887580] [2021-11-03 04:45:03,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:45:03,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:45:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:03,496 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:03,899 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2021-11-03 04:45:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:45:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:45:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:03,901 INFO L225 Difference]: With dead ends: 123 [2021-11-03 04:45:03,901 INFO L226 Difference]: Without dead ends: 123 [2021-11-03 04:45:03,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:45:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-03 04:45:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-11-03 04:45:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 108 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2021-11-03 04:45:03,905 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 16 [2021-11-03 04:45:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:03,905 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2021-11-03 04:45:03,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2021-11-03 04:45:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:45:03,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:03,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:03,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 04:45:03,907 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1569446747, now seen corresponding path program 1 times [2021-11-03 04:45:03,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:03,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81040958] [2021-11-03 04:45:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:03,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:04,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:04,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81040958] [2021-11-03 04:45:04,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81040958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:04,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:04,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:45:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570738780] [2021-11-03 04:45:04,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:04,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:04,013 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:04,176 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2021-11-03 04:45:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:45:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:45:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:04,177 INFO L225 Difference]: With dead ends: 148 [2021-11-03 04:45:04,177 INFO L226 Difference]: Without dead ends: 148 [2021-11-03 04:45:04,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:45:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-03 04:45:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2021-11-03 04:45:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.4615384615384615) internal successors, (133), 111 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-11-03 04:45:04,181 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 17 [2021-11-03 04:45:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:04,181 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-11-03 04:45:04,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-11-03 04:45:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:45:04,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:04,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:04,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 04:45:04,183 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1866896108, now seen corresponding path program 1 times [2021-11-03 04:45:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:04,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312338110] [2021-11-03 04:45:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:04,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:04,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:04,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312338110] [2021-11-03 04:45:04,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312338110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:04,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:45:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570490467] [2021-11-03 04:45:04,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:04,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:04,312 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:04,572 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-11-03 04:45:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:45:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:45:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:04,574 INFO L225 Difference]: With dead ends: 131 [2021-11-03 04:45:04,574 INFO L226 Difference]: Without dead ends: 131 [2021-11-03 04:45:04,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:45:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-03 04:45:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-11-03 04:45:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 115 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-11-03 04:45:04,576 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 17 [2021-11-03 04:45:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:04,577 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-11-03 04:45:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-11-03 04:45:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:45:04,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:04,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:04,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 04:45:04,578 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1866896109, now seen corresponding path program 1 times [2021-11-03 04:45:04,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:04,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502344483] [2021-11-03 04:45:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:04,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:04,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:04,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502344483] [2021-11-03 04:45:04,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502344483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:04,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:04,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:45:04,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676700409] [2021-11-03 04:45:04,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:04,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:04,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:45:04,689 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:04,960 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2021-11-03 04:45:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:45:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:45:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:04,961 INFO L225 Difference]: With dead ends: 142 [2021-11-03 04:45:04,962 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:45:04,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:45:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2021-11-03 04:45:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.4421052631578948) internal successors, (137), 115 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-11-03 04:45:04,964 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 17 [2021-11-03 04:45:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:04,965 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-11-03 04:45:04,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-11-03 04:45:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:45:04,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:04,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:04,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 04:45:04,966 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1867332820, now seen corresponding path program 1 times [2021-11-03 04:45:04,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:04,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220543815] [2021-11-03 04:45:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:04,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:04,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:04,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220543815] [2021-11-03 04:45:04,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220543815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:04,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:04,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:45:04,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575980893] [2021-11-03 04:45:04,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:45:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:45:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:45:04,997 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:05,009 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2021-11-03 04:45:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:45:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:45:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:05,011 INFO L225 Difference]: With dead ends: 179 [2021-11-03 04:45:05,012 INFO L226 Difference]: Without dead ends: 179 [2021-11-03 04:45:05,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:45:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-03 04:45:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-03 04:45:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 128 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2021-11-03 04:45:05,016 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 17 [2021-11-03 04:45:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2021-11-03 04:45:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2021-11-03 04:45:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:45:05,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:05,018 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:05,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 04:45:05,018 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1410461874, now seen corresponding path program 1 times [2021-11-03 04:45:05,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:05,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174341908] [2021-11-03 04:45:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:05,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:05,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:45:05,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174341908] [2021-11-03 04:45:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174341908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:05,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:05,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 04:45:05,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024832479] [2021-11-03 04:45:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:45:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:45:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:45:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:45:05,141 INFO L87 Difference]: Start difference. First operand 129 states and 151 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:05,334 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-11-03 04:45:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:45:05,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:45:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:05,336 INFO L225 Difference]: With dead ends: 121 [2021-11-03 04:45:05,336 INFO L226 Difference]: Without dead ends: 121 [2021-11-03 04:45:05,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:45:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-03 04:45:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2021-11-03 04:45:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-03 04:45:05,339 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 18 [2021-11-03 04:45:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:05,340 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-03 04:45:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-03 04:45:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:45:05,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:05,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:05,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 04:45:05,341 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-03 04:45:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1209091334, now seen corresponding path program 1 times [2021-11-03 04:45:05,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:45:05,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059460042] [2021-11-03 04:45:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:05,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:45:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:45:05,366 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 04:45:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:45:05,412 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 04:45:05,412 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 04:45:05,413 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-11-03 04:45:05,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-11-03 04:45:05,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-11-03 04:45:05,416 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-11-03 04:45:05,416 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-11-03 04:45:05,416 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-11-03 04:45:05,416 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-11-03 04:45:05,416 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-11-03 04:45:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-11-03 04:45:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-11-03 04:45:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-11-03 04:45:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-11-03 04:45:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-11-03 04:45:05,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-11-03 04:45:05,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-11-03 04:45:05,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-11-03 04:45:05,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-11-03 04:45:05,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-11-03 04:45:05,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-11-03 04:45:05,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-11-03 04:45:05,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-11-03 04:45:05,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-11-03 04:45:05,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK [2021-11-03 04:45:05,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-11-03 04:45:05,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-11-03 04:45:05,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-11-03 04:45:05,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-11-03 04:45:05,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-11-03 04:45:05,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-11-03 04:45:05,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-11-03 04:45:05,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-11-03 04:45:05,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-11-03 04:45:05,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-11-03 04:45:05,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-11-03 04:45:05,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-11-03 04:45:05,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-11-03 04:45:05,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-11-03 04:45:05,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-11-03 04:45:05,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-11-03 04:45:05,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-11-03 04:45:05,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-11-03 04:45:05,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-11-03 04:45:05,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-11-03 04:45:05,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE [2021-11-03 04:45:05,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK [2021-11-03 04:45:05,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 04:45:05,428 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:05,433 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:45:05,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:45:05 BoogieIcfgContainer [2021-11-03 04:45:05,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:45:05,469 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:45:05,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:45:05,469 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:45:05,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:44:58" (3/4) ... [2021-11-03 04:45:05,471 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 04:45:05,505 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 04:45:05,505 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:45:05,507 INFO L168 Benchmark]: Toolchain (without parser) took 8620.34 ms. Allocated memory was 117.4 MB in the beginning and 195.0 MB in the end (delta: 77.6 MB). Free memory was 85.3 MB in the beginning and 104.9 MB in the end (delta: -19.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,507 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 117.4 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:45:05,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.61 ms. Allocated memory was 117.4 MB in the beginning and 151.0 MB in the end (delta: 33.6 MB). Free memory was 85.3 MB in the beginning and 116.5 MB in the end (delta: -31.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.83 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,508 INFO L168 Benchmark]: Boogie Preprocessor took 30.74 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,508 INFO L168 Benchmark]: RCFGBuilder took 717.00 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 90.9 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,509 INFO L168 Benchmark]: TraceAbstraction took 7244.05 ms. Allocated memory was 151.0 MB in the beginning and 195.0 MB in the end (delta: 44.0 MB). Free memory was 90.6 MB in the beginning and 108.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,509 INFO L168 Benchmark]: Witness Printer took 36.46 ms. Allocated memory is still 195.0 MB. Free memory was 108.1 MB in the beginning and 104.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:45:05,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 117.4 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 518.61 ms. Allocated memory was 117.4 MB in the beginning and 151.0 MB in the end (delta: 33.6 MB). Free memory was 85.3 MB in the beginning and 116.5 MB in the end (delta: -31.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.83 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.74 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 717.00 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 90.9 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7244.05 ms. Allocated memory was 151.0 MB in the beginning and 195.0 MB in the end (delta: 44.0 MB). Free memory was 90.6 MB in the beginning and 108.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. * Witness Printer took 36.46 ms. Allocated memory is still 195.0 MB. Free memory was 108.1 MB in the beginning and 104.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1034]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) [L1032] EXPR x->data [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] reach_error() - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1008]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1008]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 994]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 96 locations, 50 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1019 SDtfs, 3113 SDslu, 2195 SDs, 0 SdLazy, 3240 SolverSat, 434 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=20, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 457 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 218 ConstructedInterpolants, 0 QuantifiedInterpolants, 2659 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 21 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-03 04:45:05,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41318cb-d57f-4ba9-9303-385579089208/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)