./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:32:12,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:32:12,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:32:12,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:32:12,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:32:12,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:32:12,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:32:12,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:32:12,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:32:12,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:32:12,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:32:12,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:32:12,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:32:12,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:32:12,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:32:12,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:32:12,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:32:12,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:32:12,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:32:12,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:32:12,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:32:12,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:32:12,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:32:12,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:32:12,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:32:12,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:32:12,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:32:12,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:32:12,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:32:12,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:32:12,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:32:12,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:32:12,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:32:12,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:32:12,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:32:12,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:32:12,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:32:12,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:32:12,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:32:12,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:32:12,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:32:12,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:32:12,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:32:12,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:32:12,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:32:12,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:32:12,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:32:12,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:32:12,939 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:32:12,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:32:12,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:32:12,940 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:32:12,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:32:12,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:32:12,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:32:12,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:32:12,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:32:12,943 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:32:12,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:32:12,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:32:12,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:32:12,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:32:12,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:32:12,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:32:12,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:32:12,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:32:12,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:32:12,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:32:12,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:32:12,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:32:12,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:32:12,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2021-11-02 22:32:13,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:32:13,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:32:13,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:32:13,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:32:13,316 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:32:13,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-02 22:32:13,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/data/fb4bc82e1/c49ea46d365c4ba6bfa30b6f902a9eba/FLAG7500f397b [2021-11-02 22:32:14,151 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:32:14,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-02 22:32:14,185 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/data/fb4bc82e1/c49ea46d365c4ba6bfa30b6f902a9eba/FLAG7500f397b [2021-11-02 22:32:14,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/data/fb4bc82e1/c49ea46d365c4ba6bfa30b6f902a9eba [2021-11-02 22:32:14,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:32:14,344 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:32:14,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:32:14,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:32:14,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:32:14,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:32:14" (1/1) ... [2021-11-02 22:32:14,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289cee03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:14, skipping insertion in model container [2021-11-02 22:32:14,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:32:14" (1/1) ... [2021-11-02 22:32:14,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:32:14,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:32:15,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:32:15,089 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:32:15,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:32:15,211 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:32:15,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15 WrapperNode [2021-11-02 22:32:15,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:32:15,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:32:15,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:32:15,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:32:15,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:32:15,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:32:15,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:32:15,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:32:15,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (1/1) ... [2021-11-02 22:32:15,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:32:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:15,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:32:15,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:32:15,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:32:15,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:32:15,486 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:32:15,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:32:15,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:32:15,487 INFO L138 BoogieDeclarations]: Found implementation of procedure containsHead [2021-11-02 22:32:15,487 INFO L138 BoogieDeclarations]: Found implementation of procedure containsBody [2021-11-02 22:32:15,487 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-02 22:32:15,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:32:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:32:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:32:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:32:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:32:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:32:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:32:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:32:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:32:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:32:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:32:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:32:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:32:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:32:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:32:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:32:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:32:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:32:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:32:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:32:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:32:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:32:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:32:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:32:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:32:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:32:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:32:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:32:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:32:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:32:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:32:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:32:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:32:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:32:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:32:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:32:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:32:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:32:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:32:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:32:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:32:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:32:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:32:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:32:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:32:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:32:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:32:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:32:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:32:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:32:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:32:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:32:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:32:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:32:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:32:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:32:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:32:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:32:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:32:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:32:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:32:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:32:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:32:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:32:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:32:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:32:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:32:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:32:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:32:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:32:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:32:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:32:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:32:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:32:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:32:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:32:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:32:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:32:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:32:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:32:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:32:15,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:32:15,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:32:15,508 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:32:15,508 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:32:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:32:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:32:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:32:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:32:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:32:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:32:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:32:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:32:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:32:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:32:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:32:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:32:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:32:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:32:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:32:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:32:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:32:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:32:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:32:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:32:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:32:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:32:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:32:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:32:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:32:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:32:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-02 22:32:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:32:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure containsHead [2021-11-02 22:32:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:32:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:32:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure containsBody [2021-11-02 22:32:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-02 22:32:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:32:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:32:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:32:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:32:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:32:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:32:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:32:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:32:16,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:32:16,897 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 22:32:16,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:32:16 BoogieIcfgContainer [2021-11-02 22:32:16,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:32:16,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:32:16,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:32:16,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:32:16,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:32:14" (1/3) ... [2021-11-02 22:32:16,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ff58ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:32:16, skipping insertion in model container [2021-11-02 22:32:16,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:32:15" (2/3) ... [2021-11-02 22:32:16,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ff58ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:32:16, skipping insertion in model container [2021-11-02 22:32:16,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:32:16" (3/3) ... [2021-11-02 22:32:16,912 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2021-11-02 22:32:16,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:32:16,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-11-02 22:32:16,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:32:17,005 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 [2021-11-02 22:32:17,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-11-02 22:32:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 164 states have (on average 2.091463414634146) internal successors, (343), 311 states have internal predecessors, (343), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-02 22:32:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:32:17,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:17,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:17,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash -634974295, now seen corresponding path program 1 times [2021-11-02 22:32:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:17,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149850961] [2021-11-02 22:32:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:17,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:17,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:17,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:17,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149850961] [2021-11-02 22:32:17,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149850961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:17,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:17,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:32:17,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825164538] [2021-11-02 22:32:17,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:32:17,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:32:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:17,435 INFO L87 Difference]: Start difference. First operand has 334 states, 164 states have (on average 2.091463414634146) internal successors, (343), 311 states have internal predecessors, (343), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:18,567 INFO L93 Difference]: Finished difference Result 401 states and 446 transitions. [2021-11-02 22:32:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:32:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:32:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:18,594 INFO L225 Difference]: With dead ends: 401 [2021-11-02 22:32:18,594 INFO L226 Difference]: Without dead ends: 398 [2021-11-02 22:32:18,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-02 22:32:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 343. [2021-11-02 22:32:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 173 states have (on average 2.005780346820809) internal successors, (347), 319 states have internal predecessors, (347), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 388 transitions. [2021-11-02 22:32:18,713 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 388 transitions. Word has length 7 [2021-11-02 22:32:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:18,713 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 388 transitions. [2021-11-02 22:32:18,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 388 transitions. [2021-11-02 22:32:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:32:18,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:18,715 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:18,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:32:18,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -634974294, now seen corresponding path program 1 times [2021-11-02 22:32:18,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:18,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311400265] [2021-11-02 22:32:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:18,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:18,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:18,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311400265] [2021-11-02 22:32:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311400265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:18,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:18,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:32:18,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810512966] [2021-11-02 22:32:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:32:18,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:32:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:18,881 INFO L87 Difference]: Start difference. First operand 343 states and 388 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:19,614 INFO L93 Difference]: Finished difference Result 344 states and 391 transitions. [2021-11-02 22:32:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:32:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:32:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:19,618 INFO L225 Difference]: With dead ends: 344 [2021-11-02 22:32:19,619 INFO L226 Difference]: Without dead ends: 344 [2021-11-02 22:32:19,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-02 22:32:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 341. [2021-11-02 22:32:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 173 states have (on average 1.9942196531791907) internal successors, (345), 317 states have internal predecessors, (345), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 386 transitions. [2021-11-02 22:32:19,640 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 386 transitions. Word has length 7 [2021-11-02 22:32:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 386 transitions. [2021-11-02 22:32:19,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 386 transitions. [2021-11-02 22:32:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:32:19,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:19,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:32:19,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -182756523, now seen corresponding path program 1 times [2021-11-02 22:32:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:19,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074287452] [2021-11-02 22:32:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:19,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:19,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:19,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074287452] [2021-11-02 22:32:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074287452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:19,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:19,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:32:19,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229957853] [2021-11-02 22:32:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:32:19,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:32:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:19,781 INFO L87 Difference]: Start difference. First operand 341 states and 386 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:20,532 INFO L93 Difference]: Finished difference Result 336 states and 381 transitions. [2021-11-02 22:32:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:32:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-02 22:32:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:20,539 INFO L225 Difference]: With dead ends: 336 [2021-11-02 22:32:20,540 INFO L226 Difference]: Without dead ends: 336 [2021-11-02 22:32:20,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-02 22:32:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2021-11-02 22:32:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 173 states have (on average 1.9653179190751444) internal successors, (340), 312 states have internal predecessors, (340), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 381 transitions. [2021-11-02 22:32:20,562 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 381 transitions. Word has length 14 [2021-11-02 22:32:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:20,563 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 381 transitions. [2021-11-02 22:32:20,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 381 transitions. [2021-11-02 22:32:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:32:20,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:20,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:20,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:32:20,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr0REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -182756524, now seen corresponding path program 1 times [2021-11-02 22:32:20,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:20,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295205337] [2021-11-02 22:32:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:20,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:20,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:20,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:20,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295205337] [2021-11-02 22:32:20,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295205337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:20,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:20,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:32:20,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071108054] [2021-11-02 22:32:20,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:32:20,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:32:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:20,694 INFO L87 Difference]: Start difference. First operand 336 states and 381 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:21,466 INFO L93 Difference]: Finished difference Result 331 states and 376 transitions. [2021-11-02 22:32:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:32:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-02 22:32:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:21,470 INFO L225 Difference]: With dead ends: 331 [2021-11-02 22:32:21,471 INFO L226 Difference]: Without dead ends: 331 [2021-11-02 22:32:21,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:32:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-02 22:32:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2021-11-02 22:32:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 173 states have (on average 1.9364161849710984) internal successors, (335), 307 states have internal predecessors, (335), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 376 transitions. [2021-11-02 22:32:21,491 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 376 transitions. Word has length 14 [2021-11-02 22:32:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:21,491 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 376 transitions. [2021-11-02 22:32:21,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 376 transitions. [2021-11-02 22:32:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:32:21,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:21,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:21,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:32:21,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1370484513, now seen corresponding path program 1 times [2021-11-02 22:32:21,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:21,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396360723] [2021-11-02 22:32:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:21,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:21,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:21,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:21,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396360723] [2021-11-02 22:32:21,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396360723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:21,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:21,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:32:21,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757567962] [2021-11-02 22:32:21,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:32:21,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:32:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:32:21,708 INFO L87 Difference]: Start difference. First operand 331 states and 376 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:22,789 INFO L93 Difference]: Finished difference Result 375 states and 418 transitions. [2021-11-02 22:32:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:32:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:32:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:22,793 INFO L225 Difference]: With dead ends: 375 [2021-11-02 22:32:22,793 INFO L226 Difference]: Without dead ends: 375 [2021-11-02 22:32:22,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:32:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-02 22:32:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 323. [2021-11-02 22:32:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 173 states have (on average 1.8901734104046244) internal successors, (327), 299 states have internal predecessors, (327), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 368 transitions. [2021-11-02 22:32:22,808 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 368 transitions. Word has length 15 [2021-11-02 22:32:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:22,809 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 368 transitions. [2021-11-02 22:32:22,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 368 transitions. [2021-11-02 22:32:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:32:22,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:22,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:32:22,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1370484512, now seen corresponding path program 1 times [2021-11-02 22:32:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:22,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164263859] [2021-11-02 22:32:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:22,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:22,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:22,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164263859] [2021-11-02 22:32:22,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164263859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:22,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:22,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:32:22,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752781838] [2021-11-02 22:32:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:32:22,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:32:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:32:22,996 INFO L87 Difference]: Start difference. First operand 323 states and 368 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:24,317 INFO L93 Difference]: Finished difference Result 365 states and 408 transitions. [2021-11-02 22:32:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:32:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:32:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:24,324 INFO L225 Difference]: With dead ends: 365 [2021-11-02 22:32:24,324 INFO L226 Difference]: Without dead ends: 365 [2021-11-02 22:32:24,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:32:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-02 22:32:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 314. [2021-11-02 22:32:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 173 states have (on average 1.8323699421965318) internal successors, (317), 290 states have internal predecessors, (317), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-02 22:32:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 358 transitions. [2021-11-02 22:32:24,343 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 358 transitions. Word has length 15 [2021-11-02 22:32:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:24,344 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 358 transitions. [2021-11-02 22:32:24,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 358 transitions. [2021-11-02 22:32:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:32:24,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:24,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:24,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:32:24,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash -211298417, now seen corresponding path program 1 times [2021-11-02 22:32:24,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:24,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758454104] [2021-11-02 22:32:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:24,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:24,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:24,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:24,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758454104] [2021-11-02 22:32:24,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758454104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:24,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:24,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:32:24,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735377542] [2021-11-02 22:32:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:32:24,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:32:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:32:24,618 INFO L87 Difference]: Start difference. First operand 314 states and 358 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:25,885 INFO L93 Difference]: Finished difference Result 334 states and 381 transitions. [2021-11-02 22:32:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:32:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:32:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:25,889 INFO L225 Difference]: With dead ends: 334 [2021-11-02 22:32:25,889 INFO L226 Difference]: Without dead ends: 334 [2021-11-02 22:32:25,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:32:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-02 22:32:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 322. [2021-11-02 22:32:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 180 states have (on average 1.8055555555555556) internal successors, (325), 297 states have internal predecessors, (325), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-02 22:32:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 368 transitions. [2021-11-02 22:32:25,904 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 368 transitions. Word has length 24 [2021-11-02 22:32:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:25,905 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 368 transitions. [2021-11-02 22:32:25,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 368 transitions. [2021-11-02 22:32:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:32:25,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:25,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:32:25,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1166963250, now seen corresponding path program 1 times [2021-11-02 22:32:25,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:25,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131576388] [2021-11-02 22:32:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:25,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:26,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:26,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:26,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131576388] [2021-11-02 22:32:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131576388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:26,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:26,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:32:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008928322] [2021-11-02 22:32:26,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:32:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:32:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:32:26,199 INFO L87 Difference]: Start difference. First operand 322 states and 368 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:27,944 INFO L93 Difference]: Finished difference Result 378 states and 423 transitions. [2021-11-02 22:32:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:32:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:32:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:27,948 INFO L225 Difference]: With dead ends: 378 [2021-11-02 22:32:27,948 INFO L226 Difference]: Without dead ends: 378 [2021-11-02 22:32:27,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:32:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-02 22:32:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-11-02 22:32:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 183 states have (on average 1.7923497267759563) internal successors, (328), 300 states have internal predecessors, (328), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-02 22:32:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 371 transitions. [2021-11-02 22:32:27,964 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 371 transitions. Word has length 26 [2021-11-02 22:32:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:27,965 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 371 transitions. [2021-11-02 22:32:27,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 371 transitions. [2021-11-02 22:32:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:32:27,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:27,968 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:27,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:32:27,968 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:32:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1151723611, now seen corresponding path program 1 times [2021-11-02 22:32:27,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:27,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318720744] [2021-11-02 22:32:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:27,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:28,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:32:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:28,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:28,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318720744] [2021-11-02 22:32:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318720744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:28,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376936141] [2021-11-02 22:32:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:28,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:28,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:28,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:32:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:32:28,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:32:29,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:32:29,628 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:32:29,631 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 23 treesize of output 32 [2021-11-02 22:32:29,774 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:32:29,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 65 [2021-11-02 22:32:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:30,264 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-02 22:32:30,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-11-02 22:32:30,631 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-02 22:32:30,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 91 [2021-11-02 22:32:30,862 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-02 22:32:30,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 56 [2021-11-02 22:32:31,538 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-02 22:32:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 65 [2021-11-02 22:32:31,857 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-02 22:32:31,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 74 [2021-11-02 22:32:32,153 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-11-02 22:32:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 55 [2021-11-02 22:32:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:32,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376936141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:32,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:32,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-11-02 22:32:32,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088619562] [2021-11-02 22:32:32,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:32:32,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:32:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:32:32,257 INFO L87 Difference]: Start difference. First operand 325 states and 371 transitions. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 26 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:33:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:50,767 INFO L93 Difference]: Finished difference Result 499 states and 602 transitions. [2021-11-02 22:33:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:33:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 26 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-11-02 22:33:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:50,774 INFO L225 Difference]: With dead ends: 499 [2021-11-02 22:33:50,774 INFO L226 Difference]: Without dead ends: 499 [2021-11-02 22:33:50,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=316, Invalid=1842, Unknown=4, NotChecked=0, Total=2162 [2021-11-02 22:33:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-02 22:33:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 330. [2021-11-02 22:33:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 188 states have (on average 1.7659574468085106) internal successors, (332), 305 states have internal predecessors, (332), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-02 22:33:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 375 transitions. [2021-11-02 22:33:50,796 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 375 transitions. Word has length 41 [2021-11-02 22:33:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:50,796 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 375 transitions. [2021-11-02 22:33:50,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 26 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:33:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 375 transitions. [2021-11-02 22:33:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:33:50,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:50,799 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:50,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:33:51,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:51,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:33:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1151723612, now seen corresponding path program 1 times [2021-11-02 22:33:51,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:51,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798370994] [2021-11-02 22:33:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:51,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:33:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:33:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:51,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:51,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798370994] [2021-11-02 22:33:51,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798370994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:51,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720690344] [2021-11-02 22:33:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:51,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:51,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:51,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:51,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:33:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:33:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:51,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:33:52,471 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 [2021-11-02 22:33:52,477 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 [2021-11-02 22:33:52,605 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:33:52,605 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 51 treesize of output 60 [2021-11-02 22:33:52,632 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:33:52,632 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 57 treesize of output 66 [2021-11-02 22:33:52,923 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:33:52,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 122 [2021-11-02 22:33:52,963 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:33:52,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 131 [2021-11-02 22:33:58,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:58,065 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-02 22:33:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 146 [2021-11-02 22:33:58,507 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-02 22:33:58,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 158 [2021-11-02 22:33:58,526 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-02 22:33:58,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-02 22:33:58,729 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-02 22:33:58,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 130 [2021-11-02 22:33:58,766 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-02 22:33:58,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 124 [2021-11-02 22:33:59,259 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-02 22:33:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 146 [2021-11-02 22:33:59,296 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-02 22:33:59,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 124 [2021-11-02 22:33:59,474 INFO L354 Elim1Store]: treesize reduction 206, result has 16.3 percent of original size [2021-11-02 22:33:59,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 146 [2021-11-02 22:33:59,516 INFO L354 Elim1Store]: treesize reduction 174, result has 17.1 percent of original size [2021-11-02 22:33:59,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 151 [2021-11-02 22:33:59,794 INFO L354 Elim1Store]: treesize reduction 198, result has 1.5 percent of original size [2021-11-02 22:33:59,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 115 [2021-11-02 22:33:59,822 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-02 22:33:59,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 62 [2021-11-02 22:33:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:59,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720690344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:59,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:59,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-11-02 22:33:59,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301887736] [2021-11-02 22:33:59,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:33:59,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:33:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=685, Unknown=2, NotChecked=0, Total=756 [2021-11-02 22:33:59,901 INFO L87 Difference]: Start difference. First operand 330 states and 375 transitions. Second operand has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 23 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:35:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:42,318 INFO L93 Difference]: Finished difference Result 497 states and 600 transitions. [2021-11-02 22:35:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:35:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 23 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-11-02 22:35:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:42,323 INFO L225 Difference]: With dead ends: 497 [2021-11-02 22:35:42,324 INFO L226 Difference]: Without dead ends: 497 [2021-11-02 22:35:42,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=303, Invalid=1754, Unknown=13, NotChecked=0, Total=2070 [2021-11-02 22:35:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-02 22:35:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 329. [2021-11-02 22:35:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 188 states have (on average 1.7606382978723405) internal successors, (331), 304 states have internal predecessors, (331), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-02 22:35:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 374 transitions. [2021-11-02 22:35:42,343 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 374 transitions. Word has length 41 [2021-11-02 22:35:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 374 transitions. [2021-11-02 22:35:42,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 23 states have internal predecessors, (69), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:35:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 374 transitions. [2021-11-02 22:35:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-02 22:35:42,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:42,357 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:42,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:42,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:42,584 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:35:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 639736793, now seen corresponding path program 1 times [2021-11-02 22:35:42,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:42,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603167484] [2021-11-02 22:35:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:42,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:35:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:35:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:35:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:35:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-02 22:35:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-02 22:35:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-02 22:35:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-02 22:35:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-02 22:35:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-02 22:35:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-02 22:35:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-02 22:35:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-02 22:35:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-02 22:35:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-02 22:35:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-02 22:35:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 105 proven. 147 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2021-11-02 22:35:42,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:42,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603167484] [2021-11-02 22:35:42,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603167484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:42,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295246532] [2021-11-02 22:35:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:42,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:42,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:42,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:35:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:35:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-02 22:35:44,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295246532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:44,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:44,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-11-02 22:35:44,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750481836] [2021-11-02 22:35:44,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:35:44,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:35:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:44,048 INFO L87 Difference]: Start difference. First operand 329 states and 374 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-02 22:35:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:44,060 INFO L93 Difference]: Finished difference Result 330 states and 375 transitions. [2021-11-02 22:35:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:35:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 221 [2021-11-02 22:35:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:44,064 INFO L225 Difference]: With dead ends: 330 [2021-11-02 22:35:44,064 INFO L226 Difference]: Without dead ends: 330 [2021-11-02 22:35:44,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-02 22:35:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-02 22:35:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 189 states have (on average 1.7566137566137565) internal successors, (332), 305 states have internal predecessors, (332), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-02 22:35:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 375 transitions. [2021-11-02 22:35:44,079 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 375 transitions. Word has length 221 [2021-11-02 22:35:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:44,080 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 375 transitions. [2021-11-02 22:35:44,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-02 22:35:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 375 transitions. [2021-11-02 22:35:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-02 22:35:44,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:44,093 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:44,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:44,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:35:44,320 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr7REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:35:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1862644601, now seen corresponding path program 1 times [2021-11-02 22:35:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:44,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917072208] [2021-11-02 22:35:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:44,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:35:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:35:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:35:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-02 22:35:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-02 22:35:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-02 22:35:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-02 22:35:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-02 22:35:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-02 22:35:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-02 22:35:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-02 22:35:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-02 22:35:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-02 22:35:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-02 22:35:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-02 22:35:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-02 22:35:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 340 proven. 11 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2021-11-02 22:35:45,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:45,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917072208] [2021-11-02 22:35:45,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917072208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:45,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134745674] [2021-11-02 22:35:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:45,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:45,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:45,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:35:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:35:45,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:46,622 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 [2021-11-02 22:35:46,722 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:35:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:35:46,837 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-02 22:35:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 52 [2021-11-02 22:35:47,001 INFO L354 Elim1Store]: treesize reduction 108, result has 29.9 percent of original size [2021-11-02 22:35:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 93 [2021-11-02 22:35:47,706 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-02 22:35:47,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-02 22:36:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 962 proven. 24 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-02 22:36:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134745674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:54,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 32 [2021-11-02 22:36:54,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3979543] [2021-11-02 22:36:54,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:36:54,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:36:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=864, Unknown=32, NotChecked=0, Total=992 [2021-11-02 22:36:54,048 INFO L87 Difference]: Start difference. First operand 330 states and 375 transitions. Second operand has 32 states, 30 states have (on average 4.3) internal successors, (129), 26 states have internal predecessors, (129), 6 states have call successors, (33), 6 states have call predecessors, (33), 6 states have return successors, (31), 7 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-02 22:37:45,097 WARN L207 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-11-02 22:38:07,500 WARN L207 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-11-02 22:38:27,818 WARN L207 SmtUtils]: Spent 12.21 s on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-11-02 22:38:54,174 WARN L207 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-11-02 22:41:48,742 WARN L207 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-11-02 22:42:23,291 WARN L207 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-11-02 22:42:51,963 WARN L207 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-11-02 22:43:42,880 WARN L207 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-11-02 22:45:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:23,389 INFO L93 Difference]: Finished difference Result 459 states and 545 transitions. [2021-11-02 22:45:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:45:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 4.3) internal successors, (129), 26 states have internal predecessors, (129), 6 states have call successors, (33), 6 states have call predecessors, (33), 6 states have return successors, (31), 7 states have call predecessors, (31), 6 states have call successors, (31) Word has length 249 [2021-11-02 22:45:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:23,394 INFO L225 Difference]: With dead ends: 459 [2021-11-02 22:45:23,394 INFO L226 Difference]: Without dead ends: 459 [2021-11-02 22:45:23,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 439.1s TimeCoverageRelationStatistics Valid=428, Invalid=2832, Unknown=162, NotChecked=0, Total=3422 [2021-11-02 22:45:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-02 22:45:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 373. [2021-11-02 22:45:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 217 states have (on average 1.705069124423963) internal successors, (370), 335 states have internal predecessors, (370), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (51), 35 states have call predecessors, (51), 36 states have call successors, (51) [2021-11-02 22:45:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 458 transitions. [2021-11-02 22:45:23,414 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 458 transitions. Word has length 249 [2021-11-02 22:45:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:23,415 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 458 transitions. [2021-11-02 22:45:23,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 4.3) internal successors, (129), 26 states have internal predecessors, (129), 6 states have call successors, (33), 6 states have call predecessors, (33), 6 states have return successors, (31), 7 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-02 22:45:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 458 transitions. [2021-11-02 22:45:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-02 22:45:23,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:23,421 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:23,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:23,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:45:23,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr6REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:45:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1723960684, now seen corresponding path program 1 times [2021-11-02 22:45:23,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:23,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393452223] [2021-11-02 22:45:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:23,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:45:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-02 22:45:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-02 22:45:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-02 22:45:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-02 22:45:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-02 22:45:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-02 22:45:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-02 22:45:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-02 22:45:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-02 22:45:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-02 22:45:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-02 22:45:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-11-02 22:45:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:24,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-02 22:45:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 274 proven. 5 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-02 22:45:25,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393452223] [2021-11-02 22:45:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393452223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:25,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134684080] [2021-11-02 22:45:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:25,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:25,511 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:25,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:45:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:45:26,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:27,765 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 11 treesize of output 7 [2021-11-02 22:45:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:45:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:28,268 INFO L354 Elim1Store]: treesize reduction 42, result has 46.8 percent of original size [2021-11-02 22:45:28,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 52 [2021-11-02 22:45:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:28,757 INFO L354 Elim1Store]: treesize reduction 98, result has 31.9 percent of original size [2021-11-02 22:45:28,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 95 [2021-11-02 22:45:30,126 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 22:45:30,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-11-02 22:45:30,456 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-02 22:45:30,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 30 [2021-11-02 22:45:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 288 proven. 5 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-02 22:45:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134684080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:30,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:45:30,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-11-02 22:45:30,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409193453] [2021-11-02 22:45:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:45:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:45:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:45:30,708 INFO L87 Difference]: Start difference. First operand 373 states and 458 transitions. Second operand has 29 states, 28 states have (on average 4.25) internal successors, (119), 26 states have internal predecessors, (119), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (31), 6 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-02 22:45:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:43,992 INFO L93 Difference]: Finished difference Result 434 states and 519 transitions. [2021-11-02 22:45:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:45:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.25) internal successors, (119), 26 states have internal predecessors, (119), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (31), 6 states have call predecessors, (31), 4 states have call successors, (31) Word has length 263 [2021-11-02 22:45:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:43,996 INFO L225 Difference]: With dead ends: 434 [2021-11-02 22:45:43,996 INFO L226 Difference]: Without dead ends: 434 [2021-11-02 22:45:43,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:45:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-02 22:45:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 367. [2021-11-02 22:45:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 217 states have (on average 1.6543778801843319) internal successors, (359), 329 states have internal predecessors, (359), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (51), 35 states have call predecessors, (51), 36 states have call successors, (51) [2021-11-02 22:45:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 447 transitions. [2021-11-02 22:45:44,021 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 447 transitions. Word has length 263 [2021-11-02 22:45:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:44,022 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 447 transitions. [2021-11-02 22:45:44,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.25) internal successors, (119), 26 states have internal predecessors, (119), 4 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (31), 6 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-02 22:45:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 447 transitions. [2021-11-02 22:45:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-02 22:45:44,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:44,028 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:44,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:44,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:44,246 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting containsHeadErr0REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:45:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -410692402, now seen corresponding path program 1 times [2021-11-02 22:45:44,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:44,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072245822] [2021-11-02 22:45:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:44,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:45:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-02 22:45:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-02 22:45:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-02 22:45:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-02 22:45:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-02 22:45:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-02 22:45:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-02 22:45:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-02 22:45:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-02 22:45:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-02 22:45:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-02 22:45:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-11-02 22:45:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-02 22:45:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2021-11-02 22:45:44,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:44,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072245822] [2021-11-02 22:45:44,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072245822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:44,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:44,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:45:44,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511709359] [2021-11-02 22:45:44,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:45:44,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:45:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:45:44,767 INFO L87 Difference]: Start difference. First operand 367 states and 447 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-02 22:45:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:47,701 INFO L93 Difference]: Finished difference Result 439 states and 522 transitions. [2021-11-02 22:45:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 267 [2021-11-02 22:45:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:47,706 INFO L225 Difference]: With dead ends: 439 [2021-11-02 22:45:47,706 INFO L226 Difference]: Without dead ends: 439 [2021-11-02 22:45:47,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:45:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-02 22:45:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 402. [2021-11-02 22:45:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 256 states have (on average 1.6953125) internal successors, (434), 363 states have internal predecessors, (434), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (51), 35 states have call predecessors, (51), 36 states have call successors, (51) [2021-11-02 22:45:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 522 transitions. [2021-11-02 22:45:47,728 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 522 transitions. Word has length 267 [2021-11-02 22:45:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:47,729 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 522 transitions. [2021-11-02 22:45:47,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-02 22:45:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 522 transitions. [2021-11-02 22:45:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-02 22:45:47,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:47,733 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:47,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:45:47,733 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting containsHeadErr1REQUIRES_VIOLATION === [containsBodyErr0REQUIRES_VIOLATION, containsBodyErr1REQUIRES_VIOLATION, containsBodyErr2REQUIRES_VIOLATION, containsBodyErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-02 22:45:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash -410692401, now seen corresponding path program 1 times [2021-11-02 22:45:47,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:47,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800067202] [2021-11-02 22:45:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:47,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:45:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-02 22:45:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-02 22:45:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-02 22:45:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-02 22:45:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-02 22:45:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-02 22:45:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-02 22:45:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-02 22:45:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-02 22:45:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-02 22:45:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:48,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-02 22:45:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-11-02 22:45:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:52,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-02 22:45:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 474 proven. 42 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-02 22:45:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800067202] [2021-11-02 22:45:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800067202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:53,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829536734] [2021-11-02 22:45:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:53,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:53,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4b3b11-570b-46fa-a0ff-2148e6ac4c88/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:45:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:45:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:55,758 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 11 treesize of output 7 [2021-11-02 22:45:55,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:45:56,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:56,306 INFO L354 Elim1Store]: treesize reduction 42, result has 46.8 percent of original size [2021-11-02 22:45:56,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 52 [2021-11-02 22:45:56,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:45:56,811 INFO L354 Elim1Store]: treesize reduction 98, result has 31.9 percent of original size [2021-11-02 22:45:56,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 92 [2021-11-02 22:45:59,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:45:59,853 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 112 treesize of output 112 [2021-11-02 22:46:00,240 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-02 22:46:00,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 30 [2021-11-02 22:46:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 288 proven. 5 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-02 22:46:00,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829536734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:00,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:00,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 48 [2021-11-02 22:46:00,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89450548] [2021-11-02 22:46:00,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:46:00,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:00,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:46:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2093, Unknown=1, NotChecked=0, Total=2256 [2021-11-02 22:46:00,996 INFO L87 Difference]: Start difference. First operand 402 states and 522 transitions. Second operand has 48 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 42 states have internal predecessors, (153), 8 states have call successors, (35), 6 states have call predecessors, (35), 6 states have return successors, (31), 8 states have call predecessors, (31), 6 states have call successors, (31)