./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL --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 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:25:13,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:25:13,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:25:14,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:25:14,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:25:14,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:25:14,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:25:14,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:25:14,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:25:14,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:25:14,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:25:14,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:25:14,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:25:14,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:25:14,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:25:14,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:25:14,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:25:14,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:25:14,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:25:14,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:25:14,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:25:14,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:25:14,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:25:14,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:25:14,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:25:14,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:25:14,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:25:14,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:25:14,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:25:14,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:25:14,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:25:14,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:25:14,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:25:14,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:25:14,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:25:14,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:25:14,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:25:14,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:25:14,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:25:14,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:25:14,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:25:14,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:25:14,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:25:14,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:25:14,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:25:14,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:25:14,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:25:14,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:25:14,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:25:14,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:25:14,198 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:25:14,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:25:14,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:25:14,200 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:25:14,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:25:14,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:25:14,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:25:14,201 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:25:14,201 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:25:14,201 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:25:14,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:25:14,202 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:25:14,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:25:14,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:25:14,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:25:14,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:25:14,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:25:14,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:25:14,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:25:14,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:25:14,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:25:14,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:25:14,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:25:14,206 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_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2021-11-19 04:25:14,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:25:14,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:25:14,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:25:14,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:25:14,499 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:25:14,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-11-19 04:25:14,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/data/4dea66031/b41ca1e6dd0b4e36aa2caeb925417270/FLAG2bb26e88c [2021-11-19 04:25:15,246 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:25:15,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-11-19 04:25:15,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/data/4dea66031/b41ca1e6dd0b4e36aa2caeb925417270/FLAG2bb26e88c [2021-11-19 04:25:15,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/data/4dea66031/b41ca1e6dd0b4e36aa2caeb925417270 [2021-11-19 04:25:15,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:25:15,582 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:25:15,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:25:15,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:25:15,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:25:15,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:25:15" (1/1) ... [2021-11-19 04:25:15,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b69c366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:15, skipping insertion in model container [2021-11-19 04:25:15,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:25:15" (1/1) ... [2021-11-19 04:25:15,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:25:15,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:25:16,028 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:25:16,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:25:16,084 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:25:16,119 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:25:16,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16 WrapperNode [2021-11-19 04:25:16,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:25:16,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:25:16,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:25:16,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:25:16,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:25:16,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:25:16,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:25:16,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:25:16,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (1/1) ... [2021-11-19 04:25:16,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:25:16,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:16,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:25:16,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:25:16,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:25:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:25:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:25:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:25:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:25:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-19 04:25:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:25:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:25:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:25:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:25:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:25:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:25:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:25:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:25:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:25:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:25:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:25:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:25:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:25:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:25:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:25:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:25:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:25:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:25:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:25:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:25:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:25:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:25:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:25:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:25:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:25:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:25:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:25:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:25:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:25:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:25:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:25:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:25:16,299 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:25:16,299 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:25:16,299 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:25:16,300 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:25:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:25:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:25:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:25:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:25:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:25:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:25:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:25:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:25:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:25:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:25:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:25:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:25:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:25:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:25:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:25:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:25:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:25:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:25:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:25:16,306 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:25:16,307 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:25:16,307 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:25:16,308 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 04:25:16,308 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:25:16,308 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:25:16,308 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:25:16,308 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:25:16,309 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:25:16,309 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:25:16,309 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:25:16,309 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:25:16,309 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:25:16,310 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:25:16,311 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:25:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:25:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:25:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:25:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:25:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:25:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:25:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:25:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:25:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:25:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:25:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:25:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:25:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:25:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:25:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:25:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:25:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:25:16,317 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:25:16,317 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:25:16,317 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:25:16,317 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:25:16,318 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:25:16,318 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:25:16,319 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-19 04:25:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:25:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:25:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:25:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:25:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:25:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:25:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:25:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:25:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:25:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:25:16,628 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:25:16,631 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:25:17,134 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:25:17,148 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:25:17,148 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 04:25:17,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:25:17 BoogieIcfgContainer [2021-11-19 04:25:17,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:25:17,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:25:17,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:25:17,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:25:17,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:25:15" (1/3) ... [2021-11-19 04:25:17,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f91708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:25:17, skipping insertion in model container [2021-11-19 04:25:17,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:16" (2/3) ... [2021-11-19 04:25:17,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f91708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:25:17, skipping insertion in model container [2021-11-19 04:25:17,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:25:17" (3/3) ... [2021-11-19 04:25:17,174 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2021-11-19 04:25:17,181 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:25:17,181 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-19 04:25:17,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:25:17,276 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 [2021-11-19 04:25:17,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-19 04:25:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:25:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:25:17,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:17,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:17,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash -127170297, now seen corresponding path program 1 times [2021-11-19 04:25:17,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:17,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112437726] [2021-11-19 04:25:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:17,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:17,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:17,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112437726] [2021-11-19 04:25:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112437726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:17,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:17,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834063820] [2021-11-19 04:25:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:17,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:17,684 INFO L87 Difference]: Start difference. First operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-11-19 04:25:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:18,066 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-11-19 04:25:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:18,069 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 [2021-11-19 04:25:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:18,080 INFO L225 Difference]: With dead ends: 170 [2021-11-19 04:25:18,081 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 04:25:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:18,086 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 215 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:18,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 120 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:25:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 04:25:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-11-19 04:25:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-11-19 04:25:18,144 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 7 [2021-11-19 04:25:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:18,145 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-11-19 04:25:18,145 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) [2021-11-19 04:25:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-11-19 04:25:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:25:18,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:18,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:18,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:25:18,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -127170296, now seen corresponding path program 1 times [2021-11-19 04:25:18,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:18,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666877039] [2021-11-19 04:25:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:18,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:18,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666877039] [2021-11-19 04:25:18,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666877039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:18,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:18,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:18,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906630209] [2021-11-19 04:25:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:18,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:18,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:18,220 INFO L87 Difference]: Start difference. First operand 128 states and 134 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) [2021-11-19 04:25:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:18,491 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-11-19 04:25:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:18,492 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 [2021-11-19 04:25:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:18,493 INFO L225 Difference]: With dead ends: 128 [2021-11-19 04:25:18,493 INFO L226 Difference]: Without dead ends: 128 [2021-11-19 04:25:18,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:18,495 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:18,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 130 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:25:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-19 04:25:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-19 04:25:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-11-19 04:25:18,507 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 7 [2021-11-19 04:25:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-11-19 04:25:18,508 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) [2021-11-19 04:25:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-11-19 04:25:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:25:18,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:18,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:25:18,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash -369177653, now seen corresponding path program 1 times [2021-11-19 04:25:18,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:18,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035997910] [2021-11-19 04:25:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:18,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:18,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:18,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035997910] [2021-11-19 04:25:18,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035997910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:18,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:18,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:18,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094565327] [2021-11-19 04:25:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:18,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:18,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:18,568 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:25:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:18,821 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2021-11-19 04:25:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-19 04:25:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:18,826 INFO L225 Difference]: With dead ends: 143 [2021-11-19 04:25:18,827 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 04:25:18,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:18,838 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:18,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 122 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:25:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 04:25:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-11-19 04:25:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-19 04:25:18,859 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 10 [2021-11-19 04:25:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-19 04:25:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:25:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-19 04:25:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:25:18,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:18,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:18,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:25:18,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash -369177652, now seen corresponding path program 1 times [2021-11-19 04:25:18,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:18,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400871102] [2021-11-19 04:25:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:18,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:18,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:18,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400871102] [2021-11-19 04:25:18,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400871102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:18,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:18,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:18,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71679159] [2021-11-19 04:25:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:18,979 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:25:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:19,184 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-19 04:25:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-19 04:25:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:19,186 INFO L225 Difference]: With dead ends: 129 [2021-11-19 04:25:19,187 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 04:25:19,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:19,197 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:19,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 131 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:25:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 04:25:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-11-19 04:25:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-11-19 04:25:19,217 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 10 [2021-11-19 04:25:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:19,218 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-11-19 04:25:19,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:25:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-11-19 04:25:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:25:19,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:19,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:19,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:25:19,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722802, now seen corresponding path program 1 times [2021-11-19 04:25:19,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:19,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653895349] [2021-11-19 04:25:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:19,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:19,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:19,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653895349] [2021-11-19 04:25:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653895349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:19,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:19,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:19,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482634806] [2021-11-19 04:25:19,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:19,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:19,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:19,309 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-19 04:25:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:19,472 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-11-19 04:25:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2021-11-19 04:25:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:19,475 INFO L225 Difference]: With dead ends: 122 [2021-11-19 04:25:19,475 INFO L226 Difference]: Without dead ends: 122 [2021-11-19 04:25:19,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:19,476 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 157 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:19,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 103 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-19 04:25:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-19 04:25:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 115 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2021-11-19 04:25:19,498 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 16 [2021-11-19 04:25:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2021-11-19 04:25:19,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-19 04:25:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2021-11-19 04:25:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:25:19,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:19,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:19,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:25:19,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722803, now seen corresponding path program 1 times [2021-11-19 04:25:19,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:19,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099183769] [2021-11-19 04:25:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:19,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099183769] [2021-11-19 04:25:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099183769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:19,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:19,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060293547] [2021-11-19 04:25:19,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:19,569 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-19 04:25:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:19,720 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-11-19 04:25:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2021-11-19 04:25:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:19,734 INFO L225 Difference]: With dead ends: 117 [2021-11-19 04:25:19,734 INFO L226 Difference]: Without dead ends: 117 [2021-11-19 04:25:19,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:19,736 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 147 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:19,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 103 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-19 04:25:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-19 04:25:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.7) internal successors, (119), 110 states have internal predecessors, (119), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2021-11-19 04:25:19,743 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 16 [2021-11-19 04:25:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:19,743 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2021-11-19 04:25:19,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-19 04:25:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2021-11-19 04:25:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:25:19,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:19,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:25:19,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167875, now seen corresponding path program 1 times [2021-11-19 04:25:19,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:19,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950919979] [2021-11-19 04:25:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:19,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:19,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:19,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950919979] [2021-11-19 04:25:19,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950919979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:19,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:19,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:25:19,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072777532] [2021-11-19 04:25:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:25:19,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:25:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:25:19,849 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-19 04:25:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:20,341 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2021-11-19 04:25:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:25:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2021-11-19 04:25:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:20,343 INFO L225 Difference]: With dead ends: 227 [2021-11-19 04:25:20,344 INFO L226 Difference]: Without dead ends: 227 [2021-11-19 04:25:20,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:25:20,345 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 419 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:20,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 78 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:25:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-19 04:25:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-11-19 04:25:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.6238532110091743) internal successors, (177), 143 states have internal predecessors, (177), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2021-11-19 04:25:20,355 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2021-11-19 04:25:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:20,355 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2021-11-19 04:25:20,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-19 04:25:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2021-11-19 04:25:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:25:20,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:20,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:25:20,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167874, now seen corresponding path program 1 times [2021-11-19 04:25:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:20,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924424212] [2021-11-19 04:25:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:20,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:20,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924424212] [2021-11-19 04:25:20,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924424212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:20,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:20,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:25:20,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258419265] [2021-11-19 04:25:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:20,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:25:20,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:25:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:20,578 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:25:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:21,188 INFO L93 Difference]: Finished difference Result 208 states and 234 transitions. [2021-11-19 04:25:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:25:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2021-11-19 04:25:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:21,190 INFO L225 Difference]: With dead ends: 208 [2021-11-19 04:25:21,191 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 04:25:21,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:25:21,192 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 296 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:21,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 95 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:25:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 04:25:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 178. [2021-11-19 04:25:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 170 states have internal predecessors, (217), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:25:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 224 transitions. [2021-11-19 04:25:21,201 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 224 transitions. Word has length 17 [2021-11-19 04:25:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:21,202 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 224 transitions. [2021-11-19 04:25:21,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-19 04:25:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 224 transitions. [2021-11-19 04:25:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:25:21,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:21,205 INFO L514 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] [2021-11-19 04:25:21,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:25:21,205 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -521946515, now seen corresponding path program 1 times [2021-11-19 04:25:21,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:21,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606365307] [2021-11-19 04:25:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:21,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:21,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:21,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:21,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606365307] [2021-11-19 04:25:21,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606365307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:21,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:21,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:25:21,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250829660] [2021-11-19 04:25:21,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:21,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:25:21,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:25:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:25:21,448 INFO L87 Difference]: Start difference. First operand 178 states and 224 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 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) [2021-11-19 04:25:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:22,077 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2021-11-19 04:25:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:25:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 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 [2021-11-19 04:25:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:22,080 INFO L225 Difference]: With dead ends: 197 [2021-11-19 04:25:22,080 INFO L226 Difference]: Without dead ends: 197 [2021-11-19 04:25:22,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:25:22,082 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:22,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 131 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:25:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-19 04:25:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2021-11-19 04:25:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 142 states have (on average 1.5704225352112675) internal successors, (223), 176 states have internal predecessors, (223), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:25:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 232 transitions. [2021-11-19 04:25:22,092 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 232 transitions. Word has length 26 [2021-11-19 04:25:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:22,092 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 232 transitions. [2021-11-19 04:25:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 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) [2021-11-19 04:25:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 232 transitions. [2021-11-19 04:25:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:25:22,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:22,094 INFO L514 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, 1, 1] [2021-11-19 04:25:22,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:25:22,095 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1013125872, now seen corresponding path program 1 times [2021-11-19 04:25:22,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:22,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702807539] [2021-11-19 04:25:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:22,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:22,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:22,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:22,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702807539] [2021-11-19 04:25:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702807539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:22,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:25:22,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164596042] [2021-11-19 04:25:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:22,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:25:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:25:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:25:22,446 INFO L87 Difference]: Start difference. First operand 185 states and 232 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-11-19 04:25:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:23,086 INFO L93 Difference]: Finished difference Result 235 states and 294 transitions. [2021-11-19 04:25:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:25:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 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 28 [2021-11-19 04:25:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:23,089 INFO L225 Difference]: With dead ends: 235 [2021-11-19 04:25:23,089 INFO L226 Difference]: Without dead ends: 235 [2021-11-19 04:25:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:25:23,090 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 247 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:23,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 116 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:25:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-19 04:25:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2021-11-19 04:25:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 118 states have (on average 1.4915254237288136) internal successors, (176), 151 states have internal predecessors, (176), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:25:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2021-11-19 04:25:23,096 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 28 [2021-11-19 04:25:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:23,096 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2021-11-19 04:25:23,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-11-19 04:25:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2021-11-19 04:25:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:25:23,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:23,098 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:25:23,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:25:23,099 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -983310407, now seen corresponding path program 1 times [2021-11-19 04:25:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:23,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134889552] [2021-11-19 04:25:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:23,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:23,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:23,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:23,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134889552] [2021-11-19 04:25:23,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134889552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:23,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449217533] [2021-11-19 04:25:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:23,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:23,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:23,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:25:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:23,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:25:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:23,555 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 [2021-11-19 04:25:23,836 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:25:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 04:25:24,004 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 04:25:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-19 04:25:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:24,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:24,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449217533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:24,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:24,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-11-19 04:25:24,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435306043] [2021-11-19 04:25:24,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:24,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:25:24,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:25:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:25:24,154 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:25:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:24,969 INFO L93 Difference]: Finished difference Result 262 states and 304 transitions. [2021-11-19 04:25:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:25:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-19 04:25:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:24,972 INFO L225 Difference]: With dead ends: 262 [2021-11-19 04:25:24,973 INFO L226 Difference]: Without dead ends: 262 [2021-11-19 04:25:24,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:25:24,974 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 197 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:24,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 330 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 740 Invalid, 0 Unknown, 380 Unchecked, 0.6s Time] [2021-11-19 04:25:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-19 04:25:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 185. [2021-11-19 04:25:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 174 states have internal predecessors, (204), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 04:25:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 221 transitions. [2021-11-19 04:25:24,984 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 221 transitions. Word has length 36 [2021-11-19 04:25:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:24,984 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 221 transitions. [2021-11-19 04:25:24,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:25:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 221 transitions. [2021-11-19 04:25:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:25:24,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:24,987 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:25:25,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:25,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:25:25,203 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -983310406, now seen corresponding path program 1 times [2021-11-19 04:25:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:25,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864860036] [2021-11-19 04:25:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:25,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:25,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:25,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:25,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864860036] [2021-11-19 04:25:25,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864860036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:25,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318739878] [2021-11-19 04:25:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:25,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:25,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:25,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:25:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:25:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:25,618 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 [2021-11-19 04:25:25,966 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:25:25,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-19 04:25:25,984 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:25:25,985 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 [2021-11-19 04:25:26,298 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 04:25:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-11-19 04:25:26,315 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:25:26,315 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 37 treesize of output 39 [2021-11-19 04:25:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:26,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318739878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:26,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:26,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-11-19 04:25:26,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154106606] [2021-11-19 04:25:26,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:26,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:25:26,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:25:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:25:26,818 INFO L87 Difference]: Start difference. First operand 185 states and 221 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 13 states have internal predecessors, (58), 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) [2021-11-19 04:25:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:27,872 INFO L93 Difference]: Finished difference Result 259 states and 308 transitions. [2021-11-19 04:25:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:25:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 13 states have internal predecessors, (58), 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 36 [2021-11-19 04:25:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:27,875 INFO L225 Difference]: With dead ends: 259 [2021-11-19 04:25:27,875 INFO L226 Difference]: Without dead ends: 259 [2021-11-19 04:25:27,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:25:27,876 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 149 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:27,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 412 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1164 Invalid, 0 Unknown, 408 Unchecked, 0.8s Time] [2021-11-19 04:25:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-19 04:25:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2021-11-19 04:25:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 151 states have (on average 1.4437086092715232) internal successors, (218), 187 states have internal predecessors, (218), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 04:25:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 235 transitions. [2021-11-19 04:25:27,887 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 235 transitions. Word has length 36 [2021-11-19 04:25:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:27,890 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 235 transitions. [2021-11-19 04:25:27,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 13 states have internal predecessors, (58), 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) [2021-11-19 04:25:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 235 transitions. [2021-11-19 04:25:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:25:27,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:27,895 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:27,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:28,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:25:28,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash 106632942, now seen corresponding path program 1 times [2021-11-19 04:25:28,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:28,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090513312] [2021-11-19 04:25:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:28,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:28,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:28,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090513312] [2021-11-19 04:25:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090513312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:28,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:25:28,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453717947] [2021-11-19 04:25:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:25:28,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:25:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:28,213 INFO L87 Difference]: Start difference. First operand 199 states and 235 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:28,477 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2021-11-19 04:25:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:25:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-11-19 04:25:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:28,479 INFO L225 Difference]: With dead ends: 191 [2021-11-19 04:25:28,480 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 04:25:28,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:25:28,480 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 125 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:28,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 108 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:25:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 04:25:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-11-19 04:25:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 130 states have (on average 1.3923076923076922) internal successors, (181), 166 states have internal predecessors, (181), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 04:25:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2021-11-19 04:25:28,492 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 35 [2021-11-19 04:25:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:28,493 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2021-11-19 04:25:28,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2021-11-19 04:25:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:25:28,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:28,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:25:28,496 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2123262917, now seen corresponding path program 1 times [2021-11-19 04:25:28,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:28,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316625347] [2021-11-19 04:25:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:28,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:28,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:28,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316625347] [2021-11-19 04:25:28,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316625347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:28,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667767720] [2021-11-19 04:25:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:28,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:28,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:28,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:28,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:25:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:25:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:28,864 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 [2021-11-19 04:25:29,094 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:25:29,095 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 24 treesize of output 26 [2021-11-19 04:25:29,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:25:29,111 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 23 treesize of output 23 [2021-11-19 04:25:29,278 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-19 04:25:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-11-19 04:25:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:29,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:29,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667767720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:29,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:29,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-11-19 04:25:29,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020623116] [2021-11-19 04:25:29,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:29,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:25:29,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:29,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:25:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:25:29,696 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-11-19 04:25:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:30,690 INFO L93 Difference]: Finished difference Result 254 states and 287 transitions. [2021-11-19 04:25:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:25:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 14 states have internal predecessors, (64), 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 39 [2021-11-19 04:25:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:30,696 INFO L225 Difference]: With dead ends: 254 [2021-11-19 04:25:30,696 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 04:25:30,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:25:30,698 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 190 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:30,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 352 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 996 Invalid, 0 Unknown, 639 Unchecked, 0.7s Time] [2021-11-19 04:25:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 04:25:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2021-11-19 04:25:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 161 states have (on average 1.360248447204969) internal successors, (219), 198 states have internal predecessors, (219), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-19 04:25:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2021-11-19 04:25:30,709 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 39 [2021-11-19 04:25:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:30,709 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2021-11-19 04:25:30,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-11-19 04:25:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2021-11-19 04:25:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:25:30,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:30,715 INFO L514 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] [2021-11-19 04:25:30,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:30,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:25:30,943 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1396634428, now seen corresponding path program 1 times [2021-11-19 04:25:30,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:30,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651637782] [2021-11-19 04:25:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:30,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:31,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:31,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:31,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:31,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651637782] [2021-11-19 04:25:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651637782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192640583] [2021-11-19 04:25:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:31,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:31,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:31,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:25:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:31,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:25:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:31,304 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 [2021-11-19 04:25:31,519 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:25:31,519 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 24 treesize of output 26 [2021-11-19 04:25:31,528 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:25:31,529 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 23 treesize of output 23 [2021-11-19 04:25:31,695 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-19 04:25:31,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-11-19 04:25:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:31,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:32,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192640583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:32,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:32,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-11-19 04:25:32,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960638101] [2021-11-19 04:25:32,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:25:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:25:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:25:32,140 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 14 states have internal predecessors, (66), 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) [2021-11-19 04:25:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:33,010 INFO L93 Difference]: Finished difference Result 314 states and 359 transitions. [2021-11-19 04:25:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:25:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 14 states have internal predecessors, (66), 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 40 [2021-11-19 04:25:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:33,013 INFO L225 Difference]: With dead ends: 314 [2021-11-19 04:25:33,013 INFO L226 Difference]: Without dead ends: 314 [2021-11-19 04:25:33,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:25:33,014 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 216 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:33,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 388 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 810 Invalid, 0 Unknown, 653 Unchecked, 0.6s Time] [2021-11-19 04:25:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-19 04:25:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 255. [2021-11-19 04:25:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 199 states have (on average 1.3718592964824121) internal successors, (273), 239 states have internal predecessors, (273), 10 states have call successors, (10), 10 states have call predecessors, (10), 12 states have return successors, (16), 5 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-19 04:25:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 299 transitions. [2021-11-19 04:25:33,034 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 299 transitions. Word has length 40 [2021-11-19 04:25:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:33,035 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 299 transitions. [2021-11-19 04:25:33,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 14 states have internal predecessors, (66), 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) [2021-11-19 04:25:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 299 transitions. [2021-11-19 04:25:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:25:33,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:33,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:33,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:33,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:25:33,258 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1396634844, now seen corresponding path program 1 times [2021-11-19 04:25:33,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:33,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428442753] [2021-11-19 04:25:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:33,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:33,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:33,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428442753] [2021-11-19 04:25:33,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428442753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:33,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835872336] [2021-11-19 04:25:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:33,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:33,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:33,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:25:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:25:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:25:33,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:25:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835872336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:33,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:25:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-11-19 04:25:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636214815] [2021-11-19 04:25:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:33,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:25:33,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:25:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:33,556 INFO L87 Difference]: Start difference. First operand 255 states and 299 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:33,565 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2021-11-19 04:25:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:25:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-19 04:25:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:33,568 INFO L225 Difference]: With dead ends: 254 [2021-11-19 04:25:33,568 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 04:25:33,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:25:33,569 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:33,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:25:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 04:25:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2021-11-19 04:25:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 197 states have (on average 1.365482233502538) internal successors, (269), 236 states have internal predecessors, (269), 10 states have call successors, (10), 10 states have call predecessors, (10), 11 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-19 04:25:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 294 transitions. [2021-11-19 04:25:33,588 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 294 transitions. Word has length 40 [2021-11-19 04:25:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:33,589 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 294 transitions. [2021-11-19 04:25:33,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 294 transitions. [2021-11-19 04:25:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:25:33,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:33,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:33,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:33,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:33,809 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2142101183, now seen corresponding path program 1 times [2021-11-19 04:25:33,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:33,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463648116] [2021-11-19 04:25:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:33,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:33,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:33,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463648116] [2021-11-19 04:25:33,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463648116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:33,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673380628] [2021-11-19 04:25:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:33,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:33,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:33,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:25:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:25:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:25:34,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:25:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673380628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:34,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:25:34,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-19 04:25:34,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864397610] [2021-11-19 04:25:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:25:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:25:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:34,190 INFO L87 Difference]: Start difference. First operand 252 states and 294 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:34,250 INFO L93 Difference]: Finished difference Result 253 states and 290 transitions. [2021-11-19 04:25:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:25:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-19 04:25:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:34,254 INFO L225 Difference]: With dead ends: 253 [2021-11-19 04:25:34,254 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 04:25:34,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:34,256 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:34,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 159 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 04:25:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2021-11-19 04:25:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 198 states have (on average 1.3232323232323233) internal successors, (262), 234 states have internal predecessors, (262), 10 states have call successors, (10), 10 states have call predecessors, (10), 11 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-19 04:25:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 287 transitions. [2021-11-19 04:25:34,267 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 287 transitions. Word has length 42 [2021-11-19 04:25:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:34,267 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 287 transitions. [2021-11-19 04:25:34,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 287 transitions. [2021-11-19 04:25:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:25:34,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:34,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:34,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:34,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:34,483 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2142101599, now seen corresponding path program 1 times [2021-11-19 04:25:34,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:34,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685867173] [2021-11-19 04:25:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:34,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:34,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:34,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685867173] [2021-11-19 04:25:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685867173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:34,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893206978] [2021-11-19 04:25:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:34,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:34,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:34,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:25:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:25:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:25:34,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:25:34,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893206978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:34,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:25:34,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-19 04:25:34,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616121146] [2021-11-19 04:25:34,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:34,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:25:34,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:25:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:34,884 INFO L87 Difference]: Start difference. First operand 250 states and 287 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:34,946 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2021-11-19 04:25:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:25:34,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-19 04:25:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:34,949 INFO L225 Difference]: With dead ends: 249 [2021-11-19 04:25:34,949 INFO L226 Difference]: Without dead ends: 249 [2021-11-19 04:25:34,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:34,950 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:34,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 150 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-19 04:25:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-19 04:25:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 198 states have (on average 1.303030303030303) internal successors, (258), 233 states have internal predecessors, (258), 10 states have call successors, (10), 10 states have call predecessors, (10), 11 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-19 04:25:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 283 transitions. [2021-11-19 04:25:34,964 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 283 transitions. Word has length 42 [2021-11-19 04:25:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:34,964 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 283 transitions. [2021-11-19 04:25:34,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:25:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 283 transitions. [2021-11-19 04:25:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:25:34,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:34,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:35,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:35,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:25:35,179 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash 351414952, now seen corresponding path program 1 times [2021-11-19 04:25:35,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:35,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910743967] [2021-11-19 04:25:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:35,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:35,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:35,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910743967] [2021-11-19 04:25:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910743967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:35,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633329057] [2021-11-19 04:25:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:35,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:35,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:35,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:25:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:25:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:35,897 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 [2021-11-19 04:25:35,959 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:25:35,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 04:25:36,367 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 20 treesize of output 16 [2021-11-19 04:25:36,464 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-19 04:25:36,464 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 29 treesize of output 38 [2021-11-19 04:25:36,620 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-19 04:25:36,621 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 59 treesize of output 71 [2021-11-19 04:25:40,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:25:40,811 INFO L354 Elim1Store]: treesize reduction 57, result has 31.3 percent of original size [2021-11-19 04:25:40,811 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 86 [2021-11-19 04:25:41,553 INFO L354 Elim1Store]: treesize reduction 108, result has 27.0 percent of original size [2021-11-19 04:25:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 117 [2021-11-19 04:25:41,882 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-19 04:25:41,883 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 106 treesize of output 73 [2021-11-19 04:25:42,748 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-19 04:25:42,748 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 104 treesize of output 82 [2021-11-19 04:25:43,128 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-19 04:25:43,129 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 113 treesize of output 91 [2021-11-19 04:25:43,426 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-11-19 04:25:43,426 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 126 treesize of output 72 [2021-11-19 04:25:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:43,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:47,512 WARN L838 $PredicateComparison]: unable to prove that (forall ((|append_#t~mem7.base| Int) (append_~node~0.offset Int) (v_DerPreprocessor_1 Int)) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base (store (store (store (select |c_#memory_$Pointer$.base| c_append_~node~0.base) append_~node~0.offset v_DerPreprocessor_1) (+ append_~node~0.offset 1) |append_#t~mem7.base|) (+ 5 append_~node~0.offset) 0)) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-11-19 04:25:49,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143684 treesize of output 143300 [2021-11-19 04:25:50,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 04:25:50,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:25:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-19 04:25:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764824746] [2021-11-19 04:25:50,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:25:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:25:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1151, Unknown=3, NotChecked=68, Total=1332 [2021-11-19 04:25:50,742 INFO L87 Difference]: Start difference. First operand 249 states and 283 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:25:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:52,409 INFO L93 Difference]: Finished difference Result 286 states and 317 transitions. [2021-11-19 04:25:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:25:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-19 04:25:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:52,412 INFO L225 Difference]: With dead ends: 286 [2021-11-19 04:25:52,412 INFO L226 Difference]: Without dead ends: 286 [2021-11-19 04:25:52,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=234, Invalid=2023, Unknown=3, NotChecked=92, Total=2352 [2021-11-19 04:25:52,414 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 323 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:52,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 88 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:25:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-19 04:25:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 255. [2021-11-19 04:25:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 203 states have (on average 1.2857142857142858) internal successors, (261), 239 states have internal predecessors, (261), 10 states have call successors, (10), 10 states have call predecessors, (10), 12 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-19 04:25:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2021-11-19 04:25:52,425 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 44 [2021-11-19 04:25:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:52,426 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2021-11-19 04:25:52,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:25:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2021-11-19 04:25:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:25:52,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:52,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:52,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:52,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:52,644 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-19 04:25:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 351414953, now seen corresponding path program 1 times [2021-11-19 04:25:52,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:52,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199922447] [2021-11-19 04:25:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:53,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:25:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:25:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199922447] [2021-11-19 04:25:53,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199922447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:53,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316775259] [2021-11-19 04:25:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:53,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:53,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e2173-3d5d-4e57-a496-066bf81a526c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:25:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:53,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-19 04:25:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:53,491 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 [2021-11-19 04:25:53,569 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:25:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 04:25:53,706 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 [2021-11-19 04:25:53,997 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 [2021-11-19 04:25:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:25:54,106 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-19 04:25:54,106 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 [2021-11-19 04:25:54,144 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-19 04:25:54,144 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 22 [2021-11-19 04:25:54,264 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-19 04:25:54,265 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 97 [2021-11-19 04:25:54,294 INFO L354 Elim1Store]: treesize reduction 108, result has 27.5 percent of original size [2021-11-19 04:25:54,295 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 115 treesize of output 133 [2021-11-19 04:25:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:25:54,725 INFO L354 Elim1Store]: treesize reduction 57, result has 31.3 percent of original size [2021-11-19 04:25:54,726 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 38 treesize of output 50 [2021-11-19 04:25:55,219 INFO L354 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2021-11-19 04:25:55,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 171 [2021-11-19 04:25:55,234 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-19 04:25:55,235 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 141 treesize of output 143 [2021-11-19 04:25:55,396 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-19 04:25:55,396 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 161 treesize of output 122 [2021-11-19 04:25:55,437 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-19 04:25:55,438 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 146 treesize of output 122 [2021-11-19 04:25:55,807 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-19 04:25:55,807 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 157 treesize of output 144 [2021-11-19 04:25:55,839 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-19 04:25:55,840 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 144 treesize of output 116 [2021-11-19 04:25:55,989 INFO L354 Elim1Store]: treesize reduction 206, result has 16.3 percent of original size [2021-11-19 04:25:55,990 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 166 treesize of output 138 [2021-11-19 04:25:56,021 INFO L354 Elim1Store]: treesize reduction 174, result has 17.1 percent of original size [2021-11-19 04:25:56,021 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 162 treesize of output 149 [2021-11-19 04:25:56,255 INFO L354 Elim1Store]: treesize reduction 198, result has 1.5 percent of original size [2021-11-19 04:25:56,255 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 179 treesize of output 107 [2021-11-19 04:25:56,280 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-19 04:25:56,281 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 89 treesize of output 60 [2021-11-19 04:25:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:56,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:04,885 WARN L227 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:26:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3984405 treesize of output 3981333 [2021-11-19 04:26:10,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 615738904 treesize of output 614165656