./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:59:38,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:59:38,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:59:38,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:59:38,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:59:38,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:59:38,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:59:38,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:59:38,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:59:38,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:59:38,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:59:38,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:59:38,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:59:38,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:59:38,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:59:38,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:59:38,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:59:38,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:59:38,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:59:38,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:59:38,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:59:38,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:59:38,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:59:38,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:59:39,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:59:39,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:59:39,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:59:39,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:59:39,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:59:39,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:59:39,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:59:39,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:59:39,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:59:39,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:59:39,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:59:39,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:59:39,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:59:39,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:59:39,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:59:39,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:59:39,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:59:39,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 01:59:39,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:59:39,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:59:39,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:59:39,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:59:39,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:59:39,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:59:39,067 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:59:39,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:59:39,068 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:59:39,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:59:39,069 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:59:39,069 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:59:39,069 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:59:39,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:59:39,070 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:59:39,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:59:39,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:59:39,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:59:39,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 01:59:39,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 01:59:39,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:59:39,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:59:39,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 01:59:39,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:59:39,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:59:39,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:59:39,074 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 01:59:39,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 01:59:39,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 01:59:39,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:59:39,075 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 01:59:39,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:59:39,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:59:39,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:59:39,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:59:39,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:39,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:59:39,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:59:39,077 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:59:39,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:59:39,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:59:39,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:59:39,078 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_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2021-11-23 01:59:39,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:59:39,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:59:39,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:59:39,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:59:39,371 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:59:39,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-11-23 01:59:39,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/data/7db002441/0c0cc7b18d744446a59167b39e400bc6/FLAG3104e20be [2021-11-23 01:59:40,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:59:40,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-11-23 01:59:40,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/data/7db002441/0c0cc7b18d744446a59167b39e400bc6/FLAG3104e20be [2021-11-23 01:59:40,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/data/7db002441/0c0cc7b18d744446a59167b39e400bc6 [2021-11-23 01:59:40,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:59:40,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:59:40,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:40,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:59:40,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:59:40,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dfb10c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40, skipping insertion in model container [2021-11-23 01:59:40,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:59:40,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:59:40,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/sv-benchmarks/c/list-ext-properties/simple-ext_1.i[23274,23287] [2021-11-23 01:59:40,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:40,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:59:40,791 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/sv-benchmarks/c/list-ext-properties/simple-ext_1.i[23274,23287] [2021-11-23 01:59:40,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:40,830 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:59:40,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40 WrapperNode [2021-11-23 01:59:40,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:40,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:40,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:59:40,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:59:40,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,902 INFO L137 Inliner]: procedures = 124, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2021-11-23 01:59:40,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:40,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:59:40,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:59:40,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:59:40,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:59:40,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:59:40,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:59:40,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:59:40,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (1/1) ... [2021-11-23 01:59:40,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:40,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:59:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:59:41,035 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 01:59:41,035 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 01:59:41,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:59:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:59:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:59:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:59:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:59:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:59:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:59:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:59:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:59:41,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:59:41,171 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:59:41,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:59:41,226 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 01:59:41,450 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:59:41,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:59:41,509 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:59:41,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:41 BoogieIcfgContainer [2021-11-23 01:59:41,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:59:41,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:59:41,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:59:41,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:59:41,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:59:40" (1/3) ... [2021-11-23 01:59:41,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d465643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:41, skipping insertion in model container [2021-11-23 01:59:41,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:40" (2/3) ... [2021-11-23 01:59:41,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d465643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:41, skipping insertion in model container [2021-11-23 01:59:41,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:41" (3/3) ... [2021-11-23 01:59:41,525 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2021-11-23 01:59:41,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:59:41,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-23 01:59:41,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:59:41,575 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 [2021-11-23 01:59:41,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-23 01:59:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 01:59:41,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:41,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 01:59:41,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash 144472609, now seen corresponding path program 1 times [2021-11-23 01:59:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373774613] [2021-11-23 01:59:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:41,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:41,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:41,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373774613] [2021-11-23 01:59:41,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373774613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:41,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:41,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:41,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008769849] [2021-11-23 01:59:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:41,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:59:41,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:59:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:59:41,863 INFO L87 Difference]: Start difference. First operand has 48 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:41,908 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-23 01:59:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:59:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 01:59:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:41,917 INFO L225 Difference]: With dead ends: 48 [2021-11-23 01:59:41,918 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 01:59:41,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:59:41,925 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:41,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:59:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 01:59:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 01:59:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-23 01:59:41,965 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 5 [2021-11-23 01:59:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:41,966 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-23 01:59:41,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-23 01:59:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:59:41,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:41,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:59:41,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:59:41,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash 183758781, now seen corresponding path program 1 times [2021-11-23 01:59:41,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154562372] [2021-11-23 01:59:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:41,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:42,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154562372] [2021-11-23 01:59:42,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154562372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:42,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:42,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:42,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231468346] [2021-11-23 01:59:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:42,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:42,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:42,081 INFO L87 Difference]: Start difference. First operand 43 states and 45 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) [2021-11-23 01:59:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:42,246 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-23 01:59:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:42,248 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 [2021-11-23 01:59:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:42,250 INFO L225 Difference]: With dead ends: 57 [2021-11-23 01:59:42,251 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 01:59:42,252 INFO L932 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 [2021-11-23 01:59:42,254 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:42,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 01:59:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-11-23 01:59:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-23 01:59:42,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 6 [2021-11-23 01:59:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:42,270 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-23 01:59:42,270 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) [2021-11-23 01:59:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-23 01:59:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:59:42,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:42,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:59:42,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:59:42,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash 183758782, now seen corresponding path program 1 times [2021-11-23 01:59:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263616907] [2021-11-23 01:59:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:42,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:42,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263616907] [2021-11-23 01:59:42,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263616907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:42,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:42,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:42,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120312747] [2021-11-23 01:59:42,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:42,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:42,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:42,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:42,383 INFO L87 Difference]: Start difference. First operand 46 states and 55 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) [2021-11-23 01:59:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:42,550 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-23 01:59:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:59:42,551 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 [2021-11-23 01:59:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:42,553 INFO L225 Difference]: With dead ends: 60 [2021-11-23 01:59:42,554 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 01:59:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:42,556 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 19 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 01:59:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-23 01:59:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-23 01:59:42,571 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 6 [2021-11-23 01:59:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:42,572 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-23 01:59:42,572 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) [2021-11-23 01:59:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-23 01:59:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 01:59:42,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:42,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:42,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:59:42,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1946737033, now seen corresponding path program 1 times [2021-11-23 01:59:42,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:42,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249290440] [2021-11-23 01:59:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:42,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:42,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249290440] [2021-11-23 01:59:42,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249290440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:42,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:42,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:42,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670573373] [2021-11-23 01:59:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:42,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:42,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:42,656 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-11-23 01:59:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:42,738 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-23 01:59:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:59:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-11-23 01:59:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:42,740 INFO L225 Difference]: With dead ends: 58 [2021-11-23 01:59:42,740 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 01:59:42,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:42,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 01:59:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-23 01:59:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 52 states have internal predecessors, (57), 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) [2021-11-23 01:59:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-23 01:59:42,765 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 10 [2021-11-23 01:59:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:42,765 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-23 01:59:42,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-11-23 01:59:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-23 01:59:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 01:59:42,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:42,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:42,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:59:42,767 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash -221270335, now seen corresponding path program 1 times [2021-11-23 01:59:42,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:42,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531285293] [2021-11-23 01:59:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:42,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:42,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531285293] [2021-11-23 01:59:42,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531285293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:42,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:42,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:59:42,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333933630] [2021-11-23 01:59:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:59:42,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:59:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:42,969 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-23 01:59:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:43,281 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-23 01:59:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:59:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2021-11-23 01:59:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:43,286 INFO L225 Difference]: With dead ends: 59 [2021-11-23 01:59:43,286 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 01:59:43,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:59:43,294 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:43,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 68 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 01:59:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-23 01:59:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.5) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-23 01:59:43,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 11 [2021-11-23 01:59:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:43,316 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-23 01:59:43,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-23 01:59:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-23 01:59:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:59:43,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:43,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:43,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:59:43,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1198442593, now seen corresponding path program 1 times [2021-11-23 01:59:43,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:43,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363867721] [2021-11-23 01:59:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:43,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:43,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:43,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363867721] [2021-11-23 01:59:43,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363867721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:43,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:43,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:43,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428419473] [2021-11-23 01:59:43,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:43,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:43,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:43,398 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:59:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:43,523 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-11-23 01:59:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:59:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-23 01:59:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:43,527 INFO L225 Difference]: With dead ends: 66 [2021-11-23 01:59:43,527 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 01:59:43,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:43,530 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:43,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 52 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 01:59:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-11-23 01:59:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.45) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-11-23 01:59:43,548 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2021-11-23 01:59:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:43,549 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-11-23 01:59:43,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:59:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-11-23 01:59:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:59:43,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:43,550 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:43,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:59:43,550 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:43,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1198442592, now seen corresponding path program 1 times [2021-11-23 01:59:43,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:43,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983653939] [2021-11-23 01:59:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:43,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:43,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:43,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983653939] [2021-11-23 01:59:43,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983653939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:43,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:43,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:43,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392455408] [2021-11-23 01:59:43,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:43,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:43,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:43,624 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:59:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:43,772 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-23 01:59:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:59:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-23 01:59:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:43,773 INFO L225 Difference]: With dead ends: 61 [2021-11-23 01:59:43,773 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 01:59:43,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:59:43,775 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:43,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 01:59:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-11-23 01:59:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 44 states have internal predecessors, (49), 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) [2021-11-23 01:59:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-23 01:59:43,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 12 [2021-11-23 01:59:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-23 01:59:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:59:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-23 01:59:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:59:43,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:43,793 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:43,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:59:43,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2107766282, now seen corresponding path program 1 times [2021-11-23 01:59:43,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555939600] [2021-11-23 01:59:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:43,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555939600] [2021-11-23 01:59:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555939600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931723888] [2021-11-23 01:59:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:43,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:43,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:44,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:59:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 01:59:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 01:59:44,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 01:59:44,482 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-23 01:59:44,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-11-23 01:59:44,492 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-23 01:59:44,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-23 01:59:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:44,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:59:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-11-23 01:59:44,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-11-23 01:59:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:44,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931723888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:59:44,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729938554] [2021-11-23 01:59:44,851 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:59:44,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:59:44,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:59:44,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:59:44,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:59:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:44,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:59:44,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:59:45,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:59:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:45,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 01:59:45,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:59:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:45,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 01:59:45,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:59:45,272 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:59:46,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1729938554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:46,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:59:46,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7] total 20 [2021-11-23 01:59:46,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580637483] [2021-11-23 01:59:46,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-23 01:59:46,388 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-23 01:59:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:46,548 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-23 01:59:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:59:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 [2021-11-23 01:59:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:46,549 INFO L225 Difference]: With dead ends: 57 [2021-11-23 01:59:46,549 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 01:59:46,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-23 01:59:46,550 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:46,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 01:59:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-23 01:59:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.368421052631579) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-23 01:59:46,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 13 [2021-11-23 01:59:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:46,555 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-23 01:59:46,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-23 01:59:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-23 01:59:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:59:46,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:46,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:46,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:46,777 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 103470743, now seen corresponding path program 1 times [2021-11-23 01:59:46,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724624498] [2021-11-23 01:59:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:46,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:59:46,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724624498] [2021-11-23 01:59:46,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724624498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:46,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:46,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:46,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899537030] [2021-11-23 01:59:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:46,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:46,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:46,851 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-11-23 01:59:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:46,909 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-23 01:59:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:59:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2021-11-23 01:59:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:46,910 INFO L225 Difference]: With dead ends: 57 [2021-11-23 01:59:46,910 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 01:59:46,910 INFO L932 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 [2021-11-23 01:59:46,911 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:46,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:59:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 01:59:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-11-23 01:59:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-23 01:59:46,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 16 [2021-11-23 01:59:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:46,915 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-23 01:59:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-11-23 01:59:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-23 01:59:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:59:46,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:46,917 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:46,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:59:46,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 01:59:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -384957409, now seen corresponding path program 1 times [2021-11-23 01:59:46,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:46,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241404929] [2021-11-23 01:59:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:46,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:47,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:47,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241404929] [2021-11-23 01:59:47,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241404929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19770768] [2021-11-23 01:59:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:47,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:47,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:47,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c935a9-d3bd-4a03-aac9-cf3cb95b7de0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:59:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:47,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 01:59:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:47,294 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:59:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:59:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:59:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:59:47,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:59:47,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:59:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-23 01:59:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 01:59:47,481 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-23 01:59:47,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 01:59:47,523 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 01:59:47,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-23 01:59:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:47,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:59:57,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1452 treesize of output 1436 [2021-11-23 01:59:57,357 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 01:59:57,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1436 treesize of output 1435