./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0521.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0521.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX --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 aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:45:52,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:45:52,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:45:52,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:45:52,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:45:52,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:45:52,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:45:52,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:45:52,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:45:52,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:45:52,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:45:52,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:45:52,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:45:52,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:45:52,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:45:52,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:45:52,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:45:52,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:45:52,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:45:52,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:45:52,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:45:52,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:45:52,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:45:52,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:45:52,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:45:52,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:45:52,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:45:52,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:45:52,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:45:52,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:45:52,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:45:52,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:45:52,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:45:52,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:45:52,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:45:52,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:45:52,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:45:52,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:45:52,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:45:52,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:45:52,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:45:52,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:45:52,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:45:52,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:45:52,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:45:52,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:45:52,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:45:52,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:45:52,202 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:45:52,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:45:52,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:45:52,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:45:52,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:45:52,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:45:52,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:45:52,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:45:52,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:45:52,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:45:52,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:45:52,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:45:52,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:52,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:45:52,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:45:52,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:45:52,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:45:52,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:45:52,205 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_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 [2021-11-09 10:45:52,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:45:52,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:45:52,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:45:52,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:45:52,518 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:45:52,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety/test-0521.i [2021-11-09 10:45:52,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/de8874da6/7b892f03196f457090d052dac2471281/FLAG230f2f53f [2021-11-09 10:45:53,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:45:53,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/sv-benchmarks/c/memsafety/test-0521.i [2021-11-09 10:45:53,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/de8874da6/7b892f03196f457090d052dac2471281/FLAG230f2f53f [2021-11-09 10:45:53,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/de8874da6/7b892f03196f457090d052dac2471281 [2021-11-09 10:45:53,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:45:53,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:45:53,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:53,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:45:53,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:45:53,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:53" (1/1) ... [2021-11-09 10:45:53,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ffaab09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:53, skipping insertion in model container [2021-11-09 10:45:53,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:53" (1/1) ... [2021-11-09 10:45:53,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:45:53,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:45:54,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:54,014 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:45:54,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:54,124 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:45:54,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54 WrapperNode [2021-11-09 10:45:54,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:54,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:45:54,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:45:54,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:45:54,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:45:54,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:45:54,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:45:54,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:45:54,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (1/1) ... [2021-11-09 10:45:54,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:54,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:54,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:45:54,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:45:54,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:45:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:45:54,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:45:54,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:45:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:45:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:45:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:45:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:45:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:45:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:45:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:45:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:45:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:45:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:45:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:45:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:45:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:45:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:45:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:45:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:45:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:45:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:45:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:45:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:45:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:45:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:45:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:45:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:45:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:45:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:45:54,364 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:45:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:45:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:45:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:45:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:45:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:45:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:45:54,367 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:45:54,368 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:45:54,369 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:45:54,370 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:45:54,370 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:45:54,370 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:45:54,370 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:45:54,370 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:45:54,371 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:45:54,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:45:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:45:55,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:45:55,570 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 10:45:55,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:55 BoogieIcfgContainer [2021-11-09 10:45:55,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:45:55,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:45:55,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:45:55,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:45:55,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:45:53" (1/3) ... [2021-11-09 10:45:55,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ed026a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:55, skipping insertion in model container [2021-11-09 10:45:55,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:54" (2/3) ... [2021-11-09 10:45:55,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ed026a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:55, skipping insertion in model container [2021-11-09 10:45:55,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:55" (3/3) ... [2021-11-09 10:45:55,583 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0521.i [2021-11-09 10:45:55,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:45:55,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 152 error locations. [2021-11-09 10:45:55,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:45:55,652 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 [2021-11-09 10:45:55,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 152 error locations. [2021-11-09 10:45:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 318 states, 161 states have (on average 2.1801242236024843) internal successors, (351), 313 states have internal predecessors, (351), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 10:45:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:45:55,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:55,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:55,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1573389995, now seen corresponding path program 1 times [2021-11-09 10:45:55,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:55,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278251175] [2021-11-09 10:45:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:55,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:55,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:55,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:55,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278251175] [2021-11-09 10:45:55,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278251175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:55,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:55,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941724721] [2021-11-09 10:45:55,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:55,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:55,933 INFO L87 Difference]: Start difference. First operand has 318 states, 161 states have (on average 2.1801242236024843) internal successors, (351), 313 states have internal predecessors, (351), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:45:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:56,545 INFO L93 Difference]: Finished difference Result 321 states and 349 transitions. [2021-11-09 10:45:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-11-09 10:45:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:56,570 INFO L225 Difference]: With dead ends: 321 [2021-11-09 10:45:56,570 INFO L226 Difference]: Without dead ends: 318 [2021-11-09 10:45:56,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-09 10:45:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2021-11-09 10:45:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 160 states have (on average 2.11875) internal successors, (339), 311 states have internal predecessors, (339), 2 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) [2021-11-09 10:45:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 342 transitions. [2021-11-09 10:45:56,638 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 342 transitions. Word has length 9 [2021-11-09 10:45:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 342 transitions. [2021-11-09 10:45:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:45:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 342 transitions. [2021-11-09 10:45:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:45:56,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:56,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:56,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:45:56,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1531494200, now seen corresponding path program 1 times [2021-11-09 10:45:56,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:56,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436825361] [2021-11-09 10:45:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:56,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:56,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:56,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:56,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436825361] [2021-11-09 10:45:56,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436825361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:56,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:56,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:56,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311191196] [2021-11-09 10:45:56,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:56,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:56,792 INFO L87 Difference]: Start difference. First operand 315 states and 342 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) [2021-11-09 10:45:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:57,354 INFO L93 Difference]: Finished difference Result 302 states and 330 transitions. [2021-11-09 10:45:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:57,355 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 [2021-11-09 10:45:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:57,357 INFO L225 Difference]: With dead ends: 302 [2021-11-09 10:45:57,358 INFO L226 Difference]: Without dead ends: 302 [2021-11-09 10:45:57,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-09 10:45:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 299. [2021-11-09 10:45:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 160 states have (on average 2.01875) internal successors, (323), 295 states have internal predecessors, (323), 2 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) [2021-11-09 10:45:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 326 transitions. [2021-11-09 10:45:57,387 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 326 transitions. Word has length 10 [2021-11-09 10:45:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 326 transitions. [2021-11-09 10:45:57,388 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) [2021-11-09 10:45:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 326 transitions. [2021-11-09 10:45:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:45:57,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:57,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:45:57,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1531494199, now seen corresponding path program 1 times [2021-11-09 10:45:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:57,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615864887] [2021-11-09 10:45:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:57,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:57,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:57,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:57,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615864887] [2021-11-09 10:45:57,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615864887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:57,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:57,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:57,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523134216] [2021-11-09 10:45:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:57,521 INFO L87 Difference]: Start difference. First operand 299 states and 326 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) [2021-11-09 10:45:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:58,021 INFO L93 Difference]: Finished difference Result 286 states and 314 transitions. [2021-11-09 10:45:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:58,022 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 [2021-11-09 10:45:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:58,024 INFO L225 Difference]: With dead ends: 286 [2021-11-09 10:45:58,024 INFO L226 Difference]: Without dead ends: 286 [2021-11-09 10:45:58,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-09 10:45:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2021-11-09 10:45:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 160 states have (on average 1.91875) internal successors, (307), 279 states have internal predecessors, (307), 2 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) [2021-11-09 10:45:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 310 transitions. [2021-11-09 10:45:58,036 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 310 transitions. Word has length 10 [2021-11-09 10:45:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:58,037 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 310 transitions. [2021-11-09 10:45:58,037 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) [2021-11-09 10:45:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 310 transitions. [2021-11-09 10:45:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:45:58,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:58,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:58,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:45:58,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1531493109, now seen corresponding path program 1 times [2021-11-09 10:45:58,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:58,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027187681] [2021-11-09 10:45:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:58,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:58,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:58,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027187681] [2021-11-09 10:45:58,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027187681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:58,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:58,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:58,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788225166] [2021-11-09 10:45:58,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:58,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:58,099 INFO L87 Difference]: Start difference. First operand 283 states and 310 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) [2021-11-09 10:45:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:58,645 INFO L93 Difference]: Finished difference Result 338 states and 374 transitions. [2021-11-09 10:45:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:58,645 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 [2021-11-09 10:45:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:58,647 INFO L225 Difference]: With dead ends: 338 [2021-11-09 10:45:58,648 INFO L226 Difference]: Without dead ends: 338 [2021-11-09 10:45:58,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-09 10:45:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 281. [2021-11-09 10:45:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 160 states have (on average 1.90625) internal successors, (305), 277 states have internal predecessors, (305), 2 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) [2021-11-09 10:45:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 308 transitions. [2021-11-09 10:45:58,659 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 308 transitions. Word has length 10 [2021-11-09 10:45:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:58,659 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 308 transitions. [2021-11-09 10:45:58,659 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) [2021-11-09 10:45:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 308 transitions. [2021-11-09 10:45:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:45:58,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:58,660 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:58,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:45:58,661 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1531493108, now seen corresponding path program 1 times [2021-11-09 10:45:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:58,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70037104] [2021-11-09 10:45:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:58,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:58,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:58,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:58,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70037104] [2021-11-09 10:45:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70037104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454082162] [2021-11-09 10:45:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:58,722 INFO L87 Difference]: Start difference. First operand 281 states and 308 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) [2021-11-09 10:45:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:59,509 INFO L93 Difference]: Finished difference Result 470 states and 519 transitions. [2021-11-09 10:45:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:59,509 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 [2021-11-09 10:45:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:59,512 INFO L225 Difference]: With dead ends: 470 [2021-11-09 10:45:59,512 INFO L226 Difference]: Without dead ends: 470 [2021-11-09 10:45:59,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-09 10:45:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 279. [2021-11-09 10:45:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 160 states have (on average 1.89375) internal successors, (303), 275 states have internal predecessors, (303), 2 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) [2021-11-09 10:45:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 306 transitions. [2021-11-09 10:45:59,522 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 306 transitions. Word has length 10 [2021-11-09 10:45:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:59,522 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 306 transitions. [2021-11-09 10:45:59,522 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) [2021-11-09 10:45:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 306 transitions. [2021-11-09 10:45:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:45:59,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:59,523 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:45:59,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:45:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1407857353, now seen corresponding path program 1 times [2021-11-09 10:45:59,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:59,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112402528] [2021-11-09 10:45:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:59,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:45:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:59,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:59,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112402528] [2021-11-09 10:45:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112402528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:59,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:45:59,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455956336] [2021-11-09 10:45:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:45:59,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:45:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:59,603 INFO L87 Difference]: Start difference. First operand 279 states and 306 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-09 10:46:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:00,100 INFO L93 Difference]: Finished difference Result 682 states and 751 transitions. [2021-11-09 10:46:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-11-09 10:46:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:00,105 INFO L225 Difference]: With dead ends: 682 [2021-11-09 10:46:00,106 INFO L226 Difference]: Without dead ends: 682 [2021-11-09 10:46:00,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-09 10:46:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 284. [2021-11-09 10:46:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 165 states have (on average 1.8727272727272728) internal successors, (309), 280 states have internal predecessors, (309), 2 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) [2021-11-09 10:46:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 312 transitions. [2021-11-09 10:46:00,119 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 312 transitions. Word has length 12 [2021-11-09 10:46:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:00,119 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 312 transitions. [2021-11-09 10:46:00,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-09 10:46:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 312 transitions. [2021-11-09 10:46:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:46:00,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:00,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:00,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:46:00,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2028307168, now seen corresponding path program 1 times [2021-11-09 10:46:00,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:00,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599767454] [2021-11-09 10:46:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:00,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:00,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:00,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:00,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599767454] [2021-11-09 10:46:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599767454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:00,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:00,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732992657] [2021-11-09 10:46:00,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:00,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:00,204 INFO L87 Difference]: Start difference. First operand 284 states and 312 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, (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) [2021-11-09 10:46:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:00,949 INFO L93 Difference]: Finished difference Result 468 states and 516 transitions. [2021-11-09 10:46:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:00,949 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, (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 15 [2021-11-09 10:46:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:00,953 INFO L225 Difference]: With dead ends: 468 [2021-11-09 10:46:00,953 INFO L226 Difference]: Without dead ends: 468 [2021-11-09 10:46:00,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-09 10:46:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 282. [2021-11-09 10:46:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 165 states have (on average 1.8606060606060606) internal successors, (307), 278 states have internal predecessors, (307), 2 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) [2021-11-09 10:46:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2021-11-09 10:46:00,964 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 15 [2021-11-09 10:46:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:00,965 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2021-11-09 10:46:00,965 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, (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) [2021-11-09 10:46:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2021-11-09 10:46:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:46:00,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:00,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:46:00,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2028307169, now seen corresponding path program 1 times [2021-11-09 10:46:00,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:00,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111014777] [2021-11-09 10:46:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:00,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:01,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111014777] [2021-11-09 10:46:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111014777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:01,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:01,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:01,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763921127] [2021-11-09 10:46:01,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:01,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:01,051 INFO L87 Difference]: Start difference. First operand 282 states and 310 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, (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) [2021-11-09 10:46:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:01,579 INFO L93 Difference]: Finished difference Result 332 states and 367 transitions. [2021-11-09 10:46:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:01,580 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, (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 15 [2021-11-09 10:46:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:01,582 INFO L225 Difference]: With dead ends: 332 [2021-11-09 10:46:01,583 INFO L226 Difference]: Without dead ends: 332 [2021-11-09 10:46:01,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-09 10:46:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 280. [2021-11-09 10:46:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 165 states have (on average 1.8484848484848484) internal successors, (305), 276 states have internal predecessors, (305), 2 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) [2021-11-09 10:46:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 308 transitions. [2021-11-09 10:46:01,600 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 308 transitions. Word has length 15 [2021-11-09 10:46:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,602 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 308 transitions. [2021-11-09 10:46:01,602 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, (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) [2021-11-09 10:46:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 308 transitions. [2021-11-09 10:46:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:46:01,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:01,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:46:01,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 659534212, now seen corresponding path program 1 times [2021-11-09 10:46:01,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932442194] [2021-11-09 10:46:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:01,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932442194] [2021-11-09 10:46:01,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932442194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:01,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:01,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:46:01,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50842476] [2021-11-09 10:46:01,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:01,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:01,755 INFO L87 Difference]: Start difference. First operand 280 states and 308 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-09 10:46:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:02,333 INFO L93 Difference]: Finished difference Result 670 states and 739 transitions. [2021-11-09 10:46:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 17 [2021-11-09 10:46:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:02,339 INFO L225 Difference]: With dead ends: 670 [2021-11-09 10:46:02,339 INFO L226 Difference]: Without dead ends: 670 [2021-11-09 10:46:02,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:46:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-09 10:46:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 283. [2021-11-09 10:46:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 168 states have (on average 1.8333333333333333) internal successors, (308), 279 states have internal predecessors, (308), 2 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) [2021-11-09 10:46:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 311 transitions. [2021-11-09 10:46:02,350 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 311 transitions. Word has length 17 [2021-11-09 10:46:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 311 transitions. [2021-11-09 10:46:02,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-09 10:46:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 311 transitions. [2021-11-09 10:46:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:46:02,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:02,352 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:02,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:46:02,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1853550630, now seen corresponding path program 1 times [2021-11-09 10:46:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145722376] [2021-11-09 10:46:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:02,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:02,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:02,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:02,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145722376] [2021-11-09 10:46:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145722376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:02,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:02,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:02,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523298666] [2021-11-09 10:46:02,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:02,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:02,427 INFO L87 Difference]: Start difference. First operand 283 states and 311 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 10:46:02,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:02,894 INFO L93 Difference]: Finished difference Result 412 states and 451 transitions. [2021-11-09 10:46:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:02,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-11-09 10:46:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:02,898 INFO L225 Difference]: With dead ends: 412 [2021-11-09 10:46:02,898 INFO L226 Difference]: Without dead ends: 412 [2021-11-09 10:46:02,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-09 10:46:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 347. [2021-11-09 10:46:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 232 states have (on average 1.8793103448275863) internal successors, (436), 343 states have internal predecessors, (436), 2 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) [2021-11-09 10:46:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 439 transitions. [2021-11-09 10:46:02,909 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 439 transitions. Word has length 19 [2021-11-09 10:46:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:02,909 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 439 transitions. [2021-11-09 10:46:02,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 10:46:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 439 transitions. [2021-11-09 10:46:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:46:02,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:02,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:46:02,929 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1618754734, now seen corresponding path program 1 times [2021-11-09 10:46:02,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:02,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19918023] [2021-11-09 10:46:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:02,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:02,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:02,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19918023] [2021-11-09 10:46:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19918023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:02,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343615329] [2021-11-09 10:46:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:02,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:02,993 INFO L87 Difference]: Start difference. First operand 347 states and 439 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-11-09 10:46:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:03,376 INFO L93 Difference]: Finished difference Result 332 states and 414 transitions. [2021-11-09 10:46:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:03,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-11-09 10:46:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:03,379 INFO L225 Difference]: With dead ends: 332 [2021-11-09 10:46:03,379 INFO L226 Difference]: Without dead ends: 332 [2021-11-09 10:46:03,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-09 10:46:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-11-09 10:46:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 217 states have (on average 1.8940092165898617) internal successors, (411), 328 states have internal predecessors, (411), 2 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) [2021-11-09 10:46:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 414 transitions. [2021-11-09 10:46:03,389 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 414 transitions. Word has length 20 [2021-11-09 10:46:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:03,390 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 414 transitions. [2021-11-09 10:46:03,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-11-09 10:46:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 414 transitions. [2021-11-09 10:46:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 10:46:03,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:03,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:03,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:46:03,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr93REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1149469566, now seen corresponding path program 1 times [2021-11-09 10:46:03,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:03,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914482689] [2021-11-09 10:46:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:03,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:03,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:03,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:03,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914482689] [2021-11-09 10:46:03,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914482689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:03,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:03,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:03,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862606166] [2021-11-09 10:46:03,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:03,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:03,437 INFO L87 Difference]: Start difference. First operand 332 states and 414 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-11-09 10:46:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:03,862 INFO L93 Difference]: Finished difference Result 316 states and 382 transitions. [2021-11-09 10:46:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:03,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-11-09 10:46:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:03,864 INFO L225 Difference]: With dead ends: 316 [2021-11-09 10:46:03,864 INFO L226 Difference]: Without dead ends: 316 [2021-11-09 10:46:03,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-09 10:46:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-11-09 10:46:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 217 states have (on average 1.7465437788018434) internal successors, (379), 312 states have internal predecessors, (379), 2 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) [2021-11-09 10:46:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 382 transitions. [2021-11-09 10:46:03,874 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 382 transitions. Word has length 21 [2021-11-09 10:46:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:03,874 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 382 transitions. [2021-11-09 10:46:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-11-09 10:46:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 382 transitions. [2021-11-09 10:46:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 10:46:03,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:03,876 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:03,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:46:03,876 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr94REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1149469567, now seen corresponding path program 1 times [2021-11-09 10:46:03,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:03,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379857681] [2021-11-09 10:46:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:03,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:03,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379857681] [2021-11-09 10:46:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379857681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:03,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:03,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:03,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041515112] [2021-11-09 10:46:03,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:03,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:03,941 INFO L87 Difference]: Start difference. First operand 316 states and 382 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-11-09 10:46:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:04,366 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2021-11-09 10:46:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-11-09 10:46:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:04,368 INFO L225 Difference]: With dead ends: 300 [2021-11-09 10:46:04,369 INFO L226 Difference]: Without dead ends: 300 [2021-11-09 10:46:04,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-09 10:46:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-11-09 10:46:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 217 states have (on average 1.599078341013825) internal successors, (347), 296 states have internal predecessors, (347), 2 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) [2021-11-09 10:46:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 350 transitions. [2021-11-09 10:46:04,377 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 350 transitions. Word has length 21 [2021-11-09 10:46:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:04,378 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 350 transitions. [2021-11-09 10:46:04,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-11-09 10:46:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 350 transitions. [2021-11-09 10:46:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:46:04,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:04,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:04,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:46:04,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr95REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash 833667807, now seen corresponding path program 1 times [2021-11-09 10:46:04,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:04,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105877952] [2021-11-09 10:46:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:04,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:04,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:04,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105877952] [2021-11-09 10:46:04,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105877952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:04,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:04,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:04,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650413092] [2021-11-09 10:46:04,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:04,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:04,455 INFO L87 Difference]: Start difference. First operand 300 states and 350 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-11-09 10:46:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:04,883 INFO L93 Difference]: Finished difference Result 398 states and 440 transitions. [2021-11-09 10:46:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:46:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 23 [2021-11-09 10:46:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:04,886 INFO L225 Difference]: With dead ends: 398 [2021-11-09 10:46:04,887 INFO L226 Difference]: Without dead ends: 398 [2021-11-09 10:46:04,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-09 10:46:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 297. [2021-11-09 10:46:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 214 states have (on average 1.5934579439252337) internal successors, (341), 293 states have internal predecessors, (341), 2 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) [2021-11-09 10:46:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 344 transitions. [2021-11-09 10:46:04,896 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 344 transitions. Word has length 23 [2021-11-09 10:46:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:04,896 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 344 transitions. [2021-11-09 10:46:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-11-09 10:46:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 344 transitions. [2021-11-09 10:46:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:46:04,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:04,897 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:04,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:46:04,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1538226823, now seen corresponding path program 1 times [2021-11-09 10:46:04,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:04,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167810409] [2021-11-09 10:46:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:04,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:04,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:05,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:05,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167810409] [2021-11-09 10:46:05,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167810409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:05,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:05,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:05,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849571348] [2021-11-09 10:46:05,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:05,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:05,005 INFO L87 Difference]: Start difference. First operand 297 states and 344 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:46:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:05,527 INFO L93 Difference]: Finished difference Result 320 states and 368 transitions. [2021-11-09 10:46:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 23 [2021-11-09 10:46:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:05,530 INFO L225 Difference]: With dead ends: 320 [2021-11-09 10:46:05,530 INFO L226 Difference]: Without dead ends: 320 [2021-11-09 10:46:05,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-09 10:46:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 299. [2021-11-09 10:46:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 218 states have (on average 1.5871559633027523) internal successors, (346), 295 states have internal predecessors, (346), 2 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) [2021-11-09 10:46:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 349 transitions. [2021-11-09 10:46:05,539 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 349 transitions. Word has length 23 [2021-11-09 10:46:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:05,540 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 349 transitions. [2021-11-09 10:46:05,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:46:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 349 transitions. [2021-11-09 10:46:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:46:05,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:05,541 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:05,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:46:05,541 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1538226824, now seen corresponding path program 1 times [2021-11-09 10:46:05,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:05,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894649000] [2021-11-09 10:46:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:05,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:05,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:05,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894649000] [2021-11-09 10:46:05,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894649000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:05,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:05,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:05,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237019972] [2021-11-09 10:46:05,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:05,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:05,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:05,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:05,687 INFO L87 Difference]: Start difference. First operand 299 states and 349 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:46:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:06,438 INFO L93 Difference]: Finished difference Result 413 states and 479 transitions. [2021-11-09 10:46:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 23 [2021-11-09 10:46:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:06,442 INFO L225 Difference]: With dead ends: 413 [2021-11-09 10:46:06,442 INFO L226 Difference]: Without dead ends: 413 [2021-11-09 10:46:06,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-09 10:46:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 298. [2021-11-09 10:46:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 218 states have (on average 1.5825688073394495) internal successors, (345), 294 states have internal predecessors, (345), 2 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) [2021-11-09 10:46:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 348 transitions. [2021-11-09 10:46:06,455 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 348 transitions. Word has length 23 [2021-11-09 10:46:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:06,455 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 348 transitions. [2021-11-09 10:46:06,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:46:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 348 transitions. [2021-11-09 10:46:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:06,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:06,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:06,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:46:06,456 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr103REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash -460559739, now seen corresponding path program 1 times [2021-11-09 10:46:06,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:06,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241763376] [2021-11-09 10:46:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:06,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:06,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:06,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241763376] [2021-11-09 10:46:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241763376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:06,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:06,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:46:06,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139347461] [2021-11-09 10:46:06,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:46:06,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:46:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:06,593 INFO L87 Difference]: Start difference. First operand 298 states and 348 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-09 10:46:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:07,096 INFO L93 Difference]: Finished difference Result 398 states and 446 transitions. [2021-11-09 10:46:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:46:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 28 [2021-11-09 10:46:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:07,098 INFO L225 Difference]: With dead ends: 398 [2021-11-09 10:46:07,098 INFO L226 Difference]: Without dead ends: 398 [2021-11-09 10:46:07,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:46:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-09 10:46:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 284. [2021-11-09 10:46:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 204 states have (on average 1.5784313725490196) internal successors, (322), 280 states have internal predecessors, (322), 2 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) [2021-11-09 10:46:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 325 transitions. [2021-11-09 10:46:07,106 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 325 transitions. Word has length 28 [2021-11-09 10:46:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 325 transitions. [2021-11-09 10:46:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-09 10:46:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 325 transitions. [2021-11-09 10:46:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:07,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:07,108 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:07,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:46:07,108 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1627942778, now seen corresponding path program 1 times [2021-11-09 10:46:07,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:07,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280375360] [2021-11-09 10:46:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:07,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280375360] [2021-11-09 10:46:07,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280375360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:07,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:07,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336134721] [2021-11-09 10:46:07,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:07,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:07,169 INFO L87 Difference]: Start difference. First operand 284 states and 325 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:46:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:07,607 INFO L93 Difference]: Finished difference Result 302 states and 335 transitions. [2021-11-09 10:46:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 28 [2021-11-09 10:46:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:07,609 INFO L225 Difference]: With dead ends: 302 [2021-11-09 10:46:07,609 INFO L226 Difference]: Without dead ends: 302 [2021-11-09 10:46:07,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-09 10:46:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2021-11-09 10:46:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 204 states have (on average 1.5735294117647058) internal successors, (321), 280 states have internal predecessors, (321), 2 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) [2021-11-09 10:46:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 324 transitions. [2021-11-09 10:46:07,617 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 324 transitions. Word has length 28 [2021-11-09 10:46:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:07,617 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 324 transitions. [2021-11-09 10:46:07,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:46:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 324 transitions. [2021-11-09 10:46:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:46:07,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:07,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:07,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:46:07,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr151ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -227034083, now seen corresponding path program 1 times [2021-11-09 10:46:07,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:07,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889939750] [2021-11-09 10:46:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:07,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889939750] [2021-11-09 10:46:07,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889939750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:07,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:07,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:07,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515235757] [2021-11-09 10:46:07,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:07,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:07,747 INFO L87 Difference]: Start difference. First operand 284 states and 324 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-09 10:46:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,032 INFO L93 Difference]: Finished difference Result 292 states and 325 transitions. [2021-11-09 10:46:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 30 [2021-11-09 10:46:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,035 INFO L225 Difference]: With dead ends: 292 [2021-11-09 10:46:08,035 INFO L226 Difference]: Without dead ends: 288 [2021-11-09 10:46:08,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-09 10:46:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2021-11-09 10:46:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 202 states have (on average 1.5742574257425743) internal successors, (318), 278 states have internal predecessors, (318), 2 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) [2021-11-09 10:46:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 321 transitions. [2021-11-09 10:46:08,045 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 321 transitions. Word has length 30 [2021-11-09 10:46:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,046 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 321 transitions. [2021-11-09 10:46:08,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-11-09 10:46:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 321 transitions. [2021-11-09 10:46:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:46:08,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,047 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:46:08,047 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr123REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:08,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1558517992, now seen corresponding path program 1 times [2021-11-09 10:46:08,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:08,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517599488] [2021-11-09 10:46:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:08,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:08,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:08,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517599488] [2021-11-09 10:46:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517599488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:08,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:08,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:08,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974089984] [2021-11-09 10:46:08,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:08,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:08,107 INFO L87 Difference]: Start difference. First operand 282 states and 321 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-09 10:46:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,420 INFO L93 Difference]: Finished difference Result 267 states and 296 transitions. [2021-11-09 10:46:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2021-11-09 10:46:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,422 INFO L225 Difference]: With dead ends: 267 [2021-11-09 10:46:08,422 INFO L226 Difference]: Without dead ends: 249 [2021-11-09 10:46:08,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-09 10:46:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-09 10:46:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 169 states have (on average 1.6272189349112427) internal successors, (275), 245 states have internal predecessors, (275), 2 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) [2021-11-09 10:46:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 278 transitions. [2021-11-09 10:46:08,428 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 278 transitions. Word has length 31 [2021-11-09 10:46:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,429 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 278 transitions. [2021-11-09 10:46:08,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-09 10:46:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 278 transitions. [2021-11-09 10:46:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:46:08,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,430 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:08,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 10:46:08,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash 5095341, now seen corresponding path program 1 times [2021-11-09 10:46:08,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:08,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619951401] [2021-11-09 10:46:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:08,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:08,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:08,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619951401] [2021-11-09 10:46:08,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619951401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:08,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:08,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 10:46:08,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199258619] [2021-11-09 10:46:08,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:46:08,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:46:08,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:46:08,654 INFO L87 Difference]: Start difference. First operand 249 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-11-09 10:46:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:09,559 INFO L93 Difference]: Finished difference Result 255 states and 284 transitions. [2021-11-09 10:46:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:46:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 31 [2021-11-09 10:46:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:09,561 INFO L225 Difference]: With dead ends: 255 [2021-11-09 10:46:09,561 INFO L226 Difference]: Without dead ends: 255 [2021-11-09 10:46:09,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:46:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-09 10:46:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 248. [2021-11-09 10:46:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.621301775147929) internal successors, (274), 244 states have internal predecessors, (274), 2 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) [2021-11-09 10:46:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 277 transitions. [2021-11-09 10:46:09,567 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 277 transitions. Word has length 31 [2021-11-09 10:46:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:09,568 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 277 transitions. [2021-11-09 10:46:09,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-11-09 10:46:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 277 transitions. [2021-11-09 10:46:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:46:09,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:09,568 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:09,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 10:46:09,569 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash 5095342, now seen corresponding path program 1 times [2021-11-09 10:46:09,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079856330] [2021-11-09 10:46:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:09,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:09,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079856330] [2021-11-09 10:46:09,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079856330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:09,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:09,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-09 10:46:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010532291] [2021-11-09 10:46:09,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:46:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:46:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:46:09,862 INFO L87 Difference]: Start difference. First operand 248 states and 277 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-11-09 10:46:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:11,504 INFO L93 Difference]: Finished difference Result 488 states and 553 transitions. [2021-11-09 10:46:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:46:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 31 [2021-11-09 10:46:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:11,508 INFO L225 Difference]: With dead ends: 488 [2021-11-09 10:46:11,508 INFO L226 Difference]: Without dead ends: 488 [2021-11-09 10:46:11,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:46:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-09 10:46:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 247. [2021-11-09 10:46:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 169 states have (on average 1.6153846153846154) internal successors, (273), 243 states have internal predecessors, (273), 2 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) [2021-11-09 10:46:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 276 transitions. [2021-11-09 10:46:11,517 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 276 transitions. Word has length 31 [2021-11-09 10:46:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:11,517 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 276 transitions. [2021-11-09 10:46:11,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-11-09 10:46:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 276 transitions. [2021-11-09 10:46:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:46:11,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:11,518 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:11,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 10:46:11,519 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash 590886851, now seen corresponding path program 1 times [2021-11-09 10:46:11,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:11,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517888924] [2021-11-09 10:46:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:11,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:11,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:11,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:11,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517888924] [2021-11-09 10:46:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517888924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:11,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:11,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:11,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815878277] [2021-11-09 10:46:11,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:11,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:11,625 INFO L87 Difference]: Start difference. First operand 247 states and 276 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-09 10:46:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:12,123 INFO L93 Difference]: Finished difference Result 269 states and 300 transitions. [2021-11-09 10:46:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:46:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 33 [2021-11-09 10:46:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:12,125 INFO L225 Difference]: With dead ends: 269 [2021-11-09 10:46:12,125 INFO L226 Difference]: Without dead ends: 269 [2021-11-09 10:46:12,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:46:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-09 10:46:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 247. [2021-11-09 10:46:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 169 states have (on average 1.6094674556213018) internal successors, (272), 243 states have internal predecessors, (272), 2 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) [2021-11-09 10:46:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2021-11-09 10:46:12,131 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 33 [2021-11-09 10:46:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2021-11-09 10:46:12,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-09 10:46:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2021-11-09 10:46:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:46:12,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:12,133 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:12,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 10:46:12,133 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1627917513, now seen corresponding path program 1 times [2021-11-09 10:46:12,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:12,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482277859] [2021-11-09 10:46:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:12,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:46:12,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:12,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482277859] [2021-11-09 10:46:12,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482277859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:12,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:12,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:12,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619625169] [2021-11-09 10:46:12,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:12,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:12,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:12,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:12,206 INFO L87 Difference]: Start difference. First operand 247 states and 275 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-09 10:46:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:12,592 INFO L93 Difference]: Finished difference Result 263 states and 294 transitions. [2021-11-09 10:46:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 35 [2021-11-09 10:46:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:12,594 INFO L225 Difference]: With dead ends: 263 [2021-11-09 10:46:12,594 INFO L226 Difference]: Without dead ends: 263 [2021-11-09 10:46:12,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-09 10:46:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 246. [2021-11-09 10:46:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 169 states have (on average 1.6035502958579881) internal successors, (271), 242 states have internal predecessors, (271), 2 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) [2021-11-09 10:46:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 274 transitions. [2021-11-09 10:46:12,601 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 274 transitions. Word has length 35 [2021-11-09 10:46:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:12,601 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 274 transitions. [2021-11-09 10:46:12,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-09 10:46:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 274 transitions. [2021-11-09 10:46:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:46:12,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:12,602 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:12,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 10:46:12,603 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1627917512, now seen corresponding path program 1 times [2021-11-09 10:46:12,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:12,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371720459] [2021-11-09 10:46:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:12,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:12,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:12,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371720459] [2021-11-09 10:46:12,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371720459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:12,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:12,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:12,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631510502] [2021-11-09 10:46:12,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:46:12,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:12,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:46:12,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:12,779 INFO L87 Difference]: Start difference. First operand 246 states and 274 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2021-11-09 10:46:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:13,537 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2021-11-09 10:46:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:46:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 35 [2021-11-09 10:46:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:13,539 INFO L225 Difference]: With dead ends: 378 [2021-11-09 10:46:13,539 INFO L226 Difference]: Without dead ends: 378 [2021-11-09 10:46:13,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:46:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-09 10:46:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 245. [2021-11-09 10:46:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 169 states have (on average 1.5976331360946745) internal successors, (270), 241 states have internal predecessors, (270), 2 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) [2021-11-09 10:46:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2021-11-09 10:46:13,546 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 35 [2021-11-09 10:46:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2021-11-09 10:46:13,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2021-11-09 10:46:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2021-11-09 10:46:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:46:13,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:13,548 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:13,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 10:46:13,548 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1455062231, now seen corresponding path program 1 times [2021-11-09 10:46:13,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:13,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108885608] [2021-11-09 10:46:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:13,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:13,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:13,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108885608] [2021-11-09 10:46:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108885608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:13,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:13,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:46:13,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616281447] [2021-11-09 10:46:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:46:13,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:46:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:13,633 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-11-09 10:46:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:14,252 INFO L93 Difference]: Finished difference Result 402 states and 447 transitions. [2021-11-09 10:46:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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 38 [2021-11-09 10:46:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:14,255 INFO L225 Difference]: With dead ends: 402 [2021-11-09 10:46:14,256 INFO L226 Difference]: Without dead ends: 402 [2021-11-09 10:46:14,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:46:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-09 10:46:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 248. [2021-11-09 10:46:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 174 states have (on average 1.5919540229885059) internal successors, (277), 244 states have internal predecessors, (277), 2 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) [2021-11-09 10:46:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 280 transitions. [2021-11-09 10:46:14,263 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 280 transitions. Word has length 38 [2021-11-09 10:46:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:14,264 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 280 transitions. [2021-11-09 10:46:14,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-11-09 10:46:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 280 transitions. [2021-11-09 10:46:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:46:14,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:14,265 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:14,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 10:46:14,265 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1455062232, now seen corresponding path program 1 times [2021-11-09 10:46:14,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:14,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360033719] [2021-11-09 10:46:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:14,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:14,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:14,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360033719] [2021-11-09 10:46:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360033719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:14,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:14,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:46:14,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324375883] [2021-11-09 10:46:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:14,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:14,393 INFO L87 Difference]: Start difference. First operand 248 states and 280 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-11-09 10:46:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:15,105 INFO L93 Difference]: Finished difference Result 500 states and 564 transitions. [2021-11-09 10:46:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:46:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 38 [2021-11-09 10:46:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:15,108 INFO L225 Difference]: With dead ends: 500 [2021-11-09 10:46:15,108 INFO L226 Difference]: Without dead ends: 500 [2021-11-09 10:46:15,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:46:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-09 10:46:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 312. [2021-11-09 10:46:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 238 states have (on average 1.5714285714285714) internal successors, (374), 308 states have internal predecessors, (374), 2 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) [2021-11-09 10:46:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 377 transitions. [2021-11-09 10:46:15,127 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 377 transitions. Word has length 38 [2021-11-09 10:46:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:15,128 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 377 transitions. [2021-11-09 10:46:15,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-11-09 10:46:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 377 transitions. [2021-11-09 10:46:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:46:15,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:15,129 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:15,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 10:46:15,129 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1360011905, now seen corresponding path program 1 times [2021-11-09 10:46:15,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:15,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145128594] [2021-11-09 10:46:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:15,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:15,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:15,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145128594] [2021-11-09 10:46:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145128594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:15,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116884337] [2021-11-09 10:46:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:15,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:15,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:15,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:46:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:46:15,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:15,973 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 [2021-11-09 10:46:15,983 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 [2021-11-09 10:46:16,235 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:46:16,236 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 42 treesize of output 41 [2021-11-09 10:46:16,249 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 10:46:16,250 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 43 treesize of output 42 [2021-11-09 10:46:16,364 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:46:16,364 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 65 treesize of output 67 [2021-11-09 10:46:16,387 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:46:16,387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 49 [2021-11-09 10:46:16,539 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:46:16,539 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 62 [2021-11-09 10:46:16,562 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:46:16,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-11-09 10:46:16,713 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 10:46:16,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 45 [2021-11-09 10:46:16,727 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 10:46:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 26 [2021-11-09 10:46:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116884337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:16,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:16,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2021-11-09 10:46:16,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387397716] [2021-11-09 10:46:16,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:46:16,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:46:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:46:16,747 INFO L87 Difference]: Start difference. First operand 312 states and 377 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 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) [2021-11-09 10:46:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:18,161 INFO L93 Difference]: Finished difference Result 388 states and 462 transitions. [2021-11-09 10:46:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:46:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 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 39 [2021-11-09 10:46:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:18,164 INFO L225 Difference]: With dead ends: 388 [2021-11-09 10:46:18,164 INFO L226 Difference]: Without dead ends: 388 [2021-11-09 10:46:18,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:46:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-09 10:46:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 341. [2021-11-09 10:46:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.5168539325842696) internal successors, (405), 337 states have internal predecessors, (405), 2 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) [2021-11-09 10:46:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 408 transitions. [2021-11-09 10:46:18,183 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 408 transitions. Word has length 39 [2021-11-09 10:46:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:18,184 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 408 transitions. [2021-11-09 10:46:18,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 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) [2021-11-09 10:46:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 408 transitions. [2021-11-09 10:46:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:46:18,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:18,185 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:18,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 10:46:18,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:46:18,386 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:18,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2130971147, now seen corresponding path program 1 times [2021-11-09 10:46:18,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:18,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005369998] [2021-11-09 10:46:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:18,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:18,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005369998] [2021-11-09 10:46:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005369998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:18,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:18,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-09 10:46:18,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824651409] [2021-11-09 10:46:18,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:46:18,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:46:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:46:18,897 INFO L87 Difference]: Start difference. First operand 341 states and 408 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-11-09 10:46:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:20,729 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2021-11-09 10:46:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:46:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 39 [2021-11-09 10:46:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:20,731 INFO L225 Difference]: With dead ends: 341 [2021-11-09 10:46:20,732 INFO L226 Difference]: Without dead ends: 341 [2021-11-09 10:46:20,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:46:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-09 10:46:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-11-09 10:46:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.5093632958801497) internal successors, (403), 337 states have internal predecessors, (403), 2 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) [2021-11-09 10:46:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 406 transitions. [2021-11-09 10:46:20,740 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 406 transitions. Word has length 39 [2021-11-09 10:46:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:20,740 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 406 transitions. [2021-11-09 10:46:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-11-09 10:46:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 406 transitions. [2021-11-09 10:46:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:46:20,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:20,742 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:20,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 10:46:20,742 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash -89817257, now seen corresponding path program 1 times [2021-11-09 10:46:20,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:20,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616440250] [2021-11-09 10:46:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:20,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:46:20,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616440250] [2021-11-09 10:46:20,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616440250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:20,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144876403] [2021-11-09 10:46:20,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:20,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:20,819 INFO L87 Difference]: Start difference. First operand 341 states and 406 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-09 10:46:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:21,191 INFO L93 Difference]: Finished difference Result 347 states and 413 transitions. [2021-11-09 10:46:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 44 [2021-11-09 10:46:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:21,193 INFO L225 Difference]: With dead ends: 347 [2021-11-09 10:46:21,194 INFO L226 Difference]: Without dead ends: 347 [2021-11-09 10:46:21,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-09 10:46:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2021-11-09 10:46:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 271 states have (on average 1.5055350553505535) internal successors, (408), 341 states have internal predecessors, (408), 2 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) [2021-11-09 10:46:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 411 transitions. [2021-11-09 10:46:21,203 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 411 transitions. Word has length 44 [2021-11-09 10:46:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:21,203 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 411 transitions. [2021-11-09 10:46:21,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-09 10:46:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 411 transitions. [2021-11-09 10:46:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:46:21,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:21,204 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:21,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 10:46:21,205 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr95REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1281871034, now seen corresponding path program 1 times [2021-11-09 10:46:21,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:21,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378689622] [2021-11-09 10:46:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:21,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:21,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:21,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378689622] [2021-11-09 10:46:21,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378689622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:21,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:21,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:21,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043827807] [2021-11-09 10:46:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:21,300 INFO L87 Difference]: Start difference. First operand 345 states and 411 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-11-09 10:46:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:21,827 INFO L93 Difference]: Finished difference Result 465 states and 519 transitions. [2021-11-09 10:46:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:46:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 47 [2021-11-09 10:46:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:21,830 INFO L225 Difference]: With dead ends: 465 [2021-11-09 10:46:21,830 INFO L226 Difference]: Without dead ends: 465 [2021-11-09 10:46:21,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:46:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-09 10:46:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 344. [2021-11-09 10:46:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.4962962962962962) internal successors, (404), 340 states have internal predecessors, (404), 2 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) [2021-11-09 10:46:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 407 transitions. [2021-11-09 10:46:21,838 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 407 transitions. Word has length 47 [2021-11-09 10:46:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:21,839 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 407 transitions. [2021-11-09 10:46:21,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-11-09 10:46:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 407 transitions. [2021-11-09 10:46:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:21,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:21,840 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:21,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-09 10:46:21,840 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr95REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1820934627, now seen corresponding path program 1 times [2021-11-09 10:46:21,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:21,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131481052] [2021-11-09 10:46:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:21,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:46:21,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:21,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131481052] [2021-11-09 10:46:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131481052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:21,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:21,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:21,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127547498] [2021-11-09 10:46:21,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:21,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:21,920 INFO L87 Difference]: Start difference. First operand 344 states and 407 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-09 10:46:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:22,328 INFO L93 Difference]: Finished difference Result 449 states and 525 transitions. [2021-11-09 10:46:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 49 [2021-11-09 10:46:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:22,330 INFO L225 Difference]: With dead ends: 449 [2021-11-09 10:46:22,330 INFO L226 Difference]: Without dead ends: 449 [2021-11-09 10:46:22,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-09 10:46:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 348. [2021-11-09 10:46:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 274 states have (on average 1.4927007299270072) internal successors, (409), 344 states have internal predecessors, (409), 2 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) [2021-11-09 10:46:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 412 transitions. [2021-11-09 10:46:22,338 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 412 transitions. Word has length 49 [2021-11-09 10:46:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 412 transitions. [2021-11-09 10:46:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-09 10:46:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 412 transitions. [2021-11-09 10:46:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:22,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:22,340 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 10:46:22,340 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr96REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1820934626, now seen corresponding path program 1 times [2021-11-09 10:46:22,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:22,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136948731] [2021-11-09 10:46:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:22,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:22,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136948731] [2021-11-09 10:46:22,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136948731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:22,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:22,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 10:46:22,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399228807] [2021-11-09 10:46:22,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:46:22,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:46:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:46:22,551 INFO L87 Difference]: Start difference. First operand 348 states and 412 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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) [2021-11-09 10:46:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:23,393 INFO L93 Difference]: Finished difference Result 375 states and 442 transitions. [2021-11-09 10:46:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:46:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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 49 [2021-11-09 10:46:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:23,395 INFO L225 Difference]: With dead ends: 375 [2021-11-09 10:46:23,396 INFO L226 Difference]: Without dead ends: 371 [2021-11-09 10:46:23,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:46:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-09 10:46:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 349. [2021-11-09 10:46:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 275 states have (on average 1.4872727272727273) internal successors, (409), 345 states have internal predecessors, (409), 2 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) [2021-11-09 10:46:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 412 transitions. [2021-11-09 10:46:23,404 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 412 transitions. Word has length 49 [2021-11-09 10:46:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 412 transitions. [2021-11-09 10:46:23,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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) [2021-11-09 10:46:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 412 transitions. [2021-11-09 10:46:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:46:23,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:23,406 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1] [2021-11-09 10:46:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-09 10:46:23,406 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1472614655, now seen corresponding path program 2 times [2021-11-09 10:46:23,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:23,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869558184] [2021-11-09 10:46:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:23,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:24,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:24,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869558184] [2021-11-09 10:46:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869558184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:24,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152304214] [2021-11-09 10:46:24,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:24,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:24,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:46:24,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 10:46:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:24,367 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 [2021-11-09 10:46:24,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:46:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:46:24,619 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:46:24,620 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 17 treesize of output 22 [2021-11-09 10:46:24,712 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 17 treesize of output 13 [2021-11-09 10:46:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:24,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-09 10:46:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:24,989 INFO L354 Elim1Store]: treesize reduction 67, result has 11.8 percent of original size [2021-11-09 10:46:24,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-11-09 10:46:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:25,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 10:46:25,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:25,398 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 10:46:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 93 [2021-11-09 10:46:25,415 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:46:25,416 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 110 treesize of output 97 [2021-11-09 10:46:26,008 INFO L354 Elim1Store]: treesize reduction 170, result has 13.3 percent of original size [2021-11-09 10:46:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 123 treesize of output 93 [2021-11-09 10:46:26,020 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:46:26,020 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 89 treesize of output 80 [2021-11-09 10:46:26,157 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 39 treesize of output 23 [2021-11-09 10:46:26,438 INFO L354 Elim1Store]: treesize reduction 148, result has 11.9 percent of original size [2021-11-09 10:46:26,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 85 treesize of output 61 [2021-11-09 10:46:26,675 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:46:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 43 [2021-11-09 10:46:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152304214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:26,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:26,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [23] total 41 [2021-11-09 10:46:26,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531721037] [2021-11-09 10:46:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:46:26,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:46:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1557, Unknown=1, NotChecked=0, Total=1722 [2021-11-09 10:46:26,783 INFO L87 Difference]: Start difference. First operand 349 states and 412 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:29,522 INFO L93 Difference]: Finished difference Result 376 states and 442 transitions. [2021-11-09 10:46:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:46:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 1 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 50 [2021-11-09 10:46:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:29,524 INFO L225 Difference]: With dead ends: 376 [2021-11-09 10:46:29,524 INFO L226 Difference]: Without dead ends: 376 [2021-11-09 10:46:29,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=581, Invalid=2958, Unknown=1, NotChecked=0, Total=3540 [2021-11-09 10:46:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-09 10:46:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 348. [2021-11-09 10:46:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 275 states have (on average 1.4836363636363636) internal successors, (408), 344 states have internal predecessors, (408), 2 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) [2021-11-09 10:46:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 411 transitions. [2021-11-09 10:46:29,544 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 411 transitions. Word has length 50 [2021-11-09 10:46:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:29,544 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 411 transitions. [2021-11-09 10:46:29,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 411 transitions. [2021-11-09 10:46:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:46:29,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:29,546 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1] [2021-11-09 10:46:29,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:29,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:29,767 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1472614654, now seen corresponding path program 1 times [2021-11-09 10:46:29,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:29,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581939717] [2021-11-09 10:46:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:29,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:30,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:30,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581939717] [2021-11-09 10:46:30,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581939717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:30,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708223595] [2021-11-09 10:46:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:30,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:30,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:30,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:46:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:46:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:30,971 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 [2021-11-09 10:46:31,176 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:46:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 10:46:31,196 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:31,196 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 27 treesize of output 31 [2021-11-09 10:46:31,444 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 10:46:31,445 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 42 treesize of output 53 [2021-11-09 10:46:31,466 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:46:31,466 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 44 treesize of output 49 [2021-11-09 10:46:31,704 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 49 treesize of output 45 [2021-11-09 10:46:31,731 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 [2021-11-09 10:46:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,116 INFO L354 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2021-11-09 10:46:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 58 [2021-11-09 10:46:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,141 INFO L354 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2021-11-09 10:46:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 10:46:32,299 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:46:32,304 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 86 treesize of output 73 [2021-11-09 10:46:32,319 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 10:46:32,320 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 111 treesize of output 110 [2021-11-09 10:46:32,602 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:46:32,603 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 94 [2021-11-09 10:46:32,630 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:46:32,632 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 120 treesize of output 122 [2021-11-09 10:46:33,143 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:46:33,144 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 133 treesize of output 135 [2021-11-09 10:46:33,166 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:46:33,166 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 81 [2021-11-09 10:46:33,624 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-09 10:46:33,625 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 5 case distinctions, treesize of input 157 treesize of output 102 [2021-11-09 10:46:33,651 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-09 10:46:33,652 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 5 case distinctions, treesize of input 109 treesize of output 102 [2021-11-09 10:46:33,955 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:46:33,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 77 [2021-11-09 10:46:33,965 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:46:33,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 55 [2021-11-09 10:46:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:34,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708223595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:34,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:34,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 33 [2021-11-09 10:46:34,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386359080] [2021-11-09 10:46:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:46:34,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:46:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:46:34,098 INFO L87 Difference]: Start difference. First operand 348 states and 411 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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) [2021-11-09 10:46:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:42,287 INFO L93 Difference]: Finished difference Result 481 states and 565 transitions. [2021-11-09 10:46:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:46:42,288 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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 50 [2021-11-09 10:46:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:42,290 INFO L225 Difference]: With dead ends: 481 [2021-11-09 10:46:42,290 INFO L226 Difference]: Without dead ends: 481 [2021-11-09 10:46:42,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:46:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-09 10:46:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 347. [2021-11-09 10:46:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 275 states have (on average 1.48) internal successors, (407), 343 states have internal predecessors, (407), 2 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) [2021-11-09 10:46:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 410 transitions. [2021-11-09 10:46:42,299 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 410 transitions. Word has length 50 [2021-11-09 10:46:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:42,300 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 410 transitions. [2021-11-09 10:46:42,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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) [2021-11-09 10:46:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 410 transitions. [2021-11-09 10:46:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:46:42,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:42,301 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:42,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:42,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:46:42,515 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr96REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1309000412, now seen corresponding path program 1 times [2021-11-09 10:46:42,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:42,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135711096] [2021-11-09 10:46:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:42,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:46:42,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:42,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135711096] [2021-11-09 10:46:42,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135711096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:42,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:42,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:42,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74217541] [2021-11-09 10:46:42,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:46:42,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:46:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:42,703 INFO L87 Difference]: Start difference. First operand 347 states and 410 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2021-11-09 10:46:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:43,648 INFO L93 Difference]: Finished difference Result 514 states and 581 transitions. [2021-11-09 10:46:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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 52 [2021-11-09 10:46:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:43,651 INFO L225 Difference]: With dead ends: 514 [2021-11-09 10:46:43,651 INFO L226 Difference]: Without dead ends: 514 [2021-11-09 10:46:43,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:46:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-09 10:46:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 347. [2021-11-09 10:46:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 275 states have (on average 1.4763636363636363) internal successors, (406), 343 states have internal predecessors, (406), 2 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) [2021-11-09 10:46:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 409 transitions. [2021-11-09 10:46:43,658 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 409 transitions. Word has length 52 [2021-11-09 10:46:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:43,658 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 409 transitions. [2021-11-09 10:46:43,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2021-11-09 10:46:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 409 transitions. [2021-11-09 10:46:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:46:43,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:43,660 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:43,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-09 10:46:43,660 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr61REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1866093058, now seen corresponding path program 1 times [2021-11-09 10:46:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:43,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825872985] [2021-11-09 10:46:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:43,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:46:43,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:43,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825872985] [2021-11-09 10:46:43,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825872985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:43,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:43,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:43,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534595680] [2021-11-09 10:46:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:46:43,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:46:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:43,893 INFO L87 Difference]: Start difference. First operand 347 states and 409 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2021-11-09 10:46:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:44,888 INFO L93 Difference]: Finished difference Result 464 states and 517 transitions. [2021-11-09 10:46:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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 53 [2021-11-09 10:46:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:44,891 INFO L225 Difference]: With dead ends: 464 [2021-11-09 10:46:44,891 INFO L226 Difference]: Without dead ends: 464 [2021-11-09 10:46:44,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:46:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-09 10:46:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 379. [2021-11-09 10:46:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 307 states have (on average 1.52442996742671) internal successors, (468), 375 states have internal predecessors, (468), 2 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) [2021-11-09 10:46:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 471 transitions. [2021-11-09 10:46:44,903 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 471 transitions. Word has length 53 [2021-11-09 10:46:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:44,903 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 471 transitions. [2021-11-09 10:46:44,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2021-11-09 10:46:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 471 transitions. [2021-11-09 10:46:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:46:44,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:44,905 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 10:46:44,905 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr62REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1980895518, now seen corresponding path program 1 times [2021-11-09 10:46:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:44,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245380678] [2021-11-09 10:46:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:45,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:46:45,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:45,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245380678] [2021-11-09 10:46:45,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245380678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:45,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359424171] [2021-11-09 10:46:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:45,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:45,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:45,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:46:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:46:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:46,178 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 [2021-11-09 10:46:46,184 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 [2021-11-09 10:46:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:46:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:46:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,523 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:46:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 10:46:46,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:46:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,731 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:46:46,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 10:46:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:46,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:46:46,842 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:46:46,842 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 49 treesize of output 48 [2021-11-09 10:46:46,857 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:46:46,858 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 2 case distinctions, treesize of input 38 treesize of output 33 [2021-11-09 10:46:46,998 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 37 treesize of output 25 [2021-11-09 10:46:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-09 10:46:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:46:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359424171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:47,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:47,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2021-11-09 10:46:47,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062041909] [2021-11-09 10:46:47,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:46:47,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:46:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:46:47,103 INFO L87 Difference]: Start difference. First operand 379 states and 471 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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) [2021-11-09 10:46:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:48,546 INFO L93 Difference]: Finished difference Result 396 states and 488 transitions. [2021-11-09 10:46:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:46:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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 55 [2021-11-09 10:46:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:48,549 INFO L225 Difference]: With dead ends: 396 [2021-11-09 10:46:48,549 INFO L226 Difference]: Without dead ends: 396 [2021-11-09 10:46:48,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:46:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-09 10:46:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2021-11-09 10:46:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 318 states have (on average 1.5062893081761006) internal successors, (479), 386 states have internal predecessors, (479), 2 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) [2021-11-09 10:46:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 482 transitions. [2021-11-09 10:46:48,558 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 482 transitions. Word has length 55 [2021-11-09 10:46:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:48,559 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 482 transitions. [2021-11-09 10:46:48,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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) [2021-11-09 10:46:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 482 transitions. [2021-11-09 10:46:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 10:46:48,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:48,560 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:48,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:48,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:46:48,775 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr103REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 780404745, now seen corresponding path program 1 times [2021-11-09 10:46:48,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:48,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088534997] [2021-11-09 10:46:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:48,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:46:48,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:48,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088534997] [2021-11-09 10:46:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088534997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:48,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:48,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:48,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111134185] [2021-11-09 10:46:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:48,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:48,863 INFO L87 Difference]: Start difference. First operand 390 states and 482 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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) [2021-11-09 10:46:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:49,407 INFO L93 Difference]: Finished difference Result 474 states and 527 transitions. [2021-11-09 10:46:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:46:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2021-11-09 10:46:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:49,410 INFO L225 Difference]: With dead ends: 474 [2021-11-09 10:46:49,410 INFO L226 Difference]: Without dead ends: 474 [2021-11-09 10:46:49,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:46:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-09 10:46:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 390. [2021-11-09 10:46:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 318 states have (on average 1.5031446540880504) internal successors, (478), 386 states have internal predecessors, (478), 2 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) [2021-11-09 10:46:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 481 transitions. [2021-11-09 10:46:49,430 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 481 transitions. Word has length 57 [2021-11-09 10:46:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:49,431 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 481 transitions. [2021-11-09 10:46:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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) [2021-11-09 10:46:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 481 transitions. [2021-11-09 10:46:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 10:46:49,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:49,432 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:49,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-09 10:46:49,433 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:46:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1435255067, now seen corresponding path program 1 times [2021-11-09 10:46:49,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:49,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546255294] [2021-11-09 10:46:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:49,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:51,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:51,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546255294] [2021-11-09 10:46:51,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546255294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346368783] [2021-11-09 10:46:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:51,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:51,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:51,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:51,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:46:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 10:46:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:51,747 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 [2021-11-09 10:46:51,841 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:51,841 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 [2021-11-09 10:46:51,930 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 24 treesize of output 20 [2021-11-09 10:46:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:52,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-09 10:46:52,152 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:46:52,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:46:52,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 33 [2021-11-09 10:46:52,435 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:46:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 36 [2021-11-09 10:46:52,613 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-09 10:46:52,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 10:46:52,876 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-09 10:46:52,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 60 [2021-11-09 10:46:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:53,061 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-09 10:46:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 101 treesize of output 77 [2021-11-09 10:46:53,084 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 [2021-11-09 10:46:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:53,528 INFO L354 Elim1Store]: treesize reduction 78, result has 36.1 percent of original size [2021-11-09 10:46:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 77 [2021-11-09 10:46:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:46:53,789 INFO L354 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2021-11-09 10:46:53,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 149 treesize of output 95 [2021-11-09 10:46:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:54,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:54,384 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 10:46:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 257 [2021-11-09 10:46:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:54,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:54,412 INFO L354 Elim1Store]: treesize reduction 130, result has 11.6 percent of original size [2021-11-09 10:46:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 242 treesize of output 122 [2021-11-09 10:46:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:55,423 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 10:46:55,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 266 [2021-11-09 10:46:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:55,456 INFO L354 Elim1Store]: treesize reduction 154, result has 9.9 percent of original size [2021-11-09 10:46:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 251 treesize of output 125 [2021-11-09 10:46:56,215 INFO L354 Elim1Store]: treesize reduction 278, result has 8.9 percent of original size [2021-11-09 10:46:56,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 271 treesize of output 137 [2021-11-09 10:46:56,232 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-09 10:46:56,232 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 4 case distinctions, treesize of input 181 treesize of output 174 [2021-11-09 10:46:56,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2021-11-09 10:46:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:57,017 INFO L354 Elim1Store]: treesize reduction 130, result has 11.6 percent of original size [2021-11-09 10:46:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 167 treesize of output 108 [2021-11-09 10:46:57,648 INFO L354 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2021-11-09 10:46:57,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 153 treesize of output 85 [2021-11-09 10:46:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:58,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346368783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:58,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 56 [2021-11-09 10:46:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920997269] [2021-11-09 10:46:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 10:46:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 10:46:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2957, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:46:58,131 INFO L87 Difference]: Start difference. First operand 390 states and 481 transitions. Second operand has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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) [2021-11-09 10:47:25,246 WARN L207 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 197 DAG size of output: 171 [2021-11-09 10:47:31,083 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 197 DAG size of output: 171 [2021-11-09 10:47:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:44,840 INFO L93 Difference]: Finished difference Result 450 states and 551 transitions. [2021-11-09 10:47:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:47:44,840 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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 59 [2021-11-09 10:47:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:44,842 INFO L225 Difference]: With dead ends: 450 [2021-11-09 10:47:44,842 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 10:47:44,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=1049, Invalid=7507, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:47:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 10:47:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 395. [2021-11-09 10:47:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 323 states have (on average 1.501547987616099) internal successors, (485), 391 states have internal predecessors, (485), 2 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) [2021-11-09 10:47:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 488 transitions. [2021-11-09 10:47:44,853 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 488 transitions. Word has length 59 [2021-11-09 10:47:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:44,853 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 488 transitions. [2021-11-09 10:47:44,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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) [2021-11-09 10:47:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 488 transitions. [2021-11-09 10:47:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 10:47:44,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:44,854 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:44,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:45,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:47:45,083 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:47:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1435255068, now seen corresponding path program 1 times [2021-11-09 10:47:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:45,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636130124] [2021-11-09 10:47:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:45,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:47,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:47,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636130124] [2021-11-09 10:47:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636130124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:47,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546557108] [2021-11-09 10:47:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:47,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:47,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:47,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:47:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 10:47:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:48,250 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 [2021-11-09 10:47:48,253 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 [2021-11-09 10:47:48,375 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:47:48,375 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 [2021-11-09 10:47:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:47:48,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 10:47:48,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 34 [2021-11-09 10:47:48,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:47:48,818 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:47:48,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:47:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:47:49,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 38 [2021-11-09 10:47:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:47:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2021-11-09 10:47:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-11-09 10:47:49,532 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-09 10:47:49,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 10:47:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-09 10:47:49,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:47:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 93 [2021-11-09 10:47:49,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:47:49,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 130 [2021-11-09 10:47:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:50,079 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:47:50,080 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 4 case distinctions, treesize of input 163 treesize of output 127 [2021-11-09 10:47:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:50,097 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-09 10:47:50,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 227 [2021-11-09 10:47:50,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,846 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:47:50,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 28 [2021-11-09 10:47:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 54 [2021-11-09 10:47:51,110 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-09 10:47:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 204 treesize of output 142 [2021-11-09 10:47:51,136 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-09 10:47:51,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 285 treesize of output 293 [2021-11-09 10:47:51,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:51,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:51,721 INFO L354 Elim1Store]: treesize reduction 136, result has 16.6 percent of original size [2021-11-09 10:47:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 299 treesize of output 310 [2021-11-09 10:47:51,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:51,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:51,754 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 10:47:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 286 treesize of output 146 [2021-11-09 10:47:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:52,518 INFO L354 Elim1Store]: treesize reduction 136, result has 16.6 percent of original size [2021-11-09 10:47:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 299 treesize of output 310 [2021-11-09 10:47:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:52,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:52,564 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 10:47:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 286 treesize of output 146 [2021-11-09 10:47:53,421 INFO L354 Elim1Store]: treesize reduction 188, result has 13.0 percent of original size [2021-11-09 10:47:53,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 323 treesize of output 171 [2021-11-09 10:47:53,463 INFO L354 Elim1Store]: treesize reduction 172, result has 13.1 percent of original size [2021-11-09 10:47:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 223 treesize of output 225 [2021-11-09 10:47:54,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:54,318 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-11-09 10:47:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 250 treesize of output 185 [2021-11-09 10:47:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:54,362 INFO L354 Elim1Store]: treesize reduction 204, result has 12.8 percent of original size [2021-11-09 10:47:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 246 treesize of output 251 [2021-11-09 10:47:55,210 INFO L354 Elim1Store]: treesize reduction 129, result has 8.5 percent of original size [2021-11-09 10:47:55,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 257 treesize of output 150 [2021-11-09 10:47:55,240 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-11-09 10:47:55,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 95 [2021-11-09 10:47:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:55,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546557108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:55,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:55,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 49 [2021-11-09 10:47:55,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535014933] [2021-11-09 10:47:55,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 10:47:55,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 10:47:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:47:55,744 INFO L87 Difference]: Start difference. First operand 395 states and 488 transitions. Second operand has 50 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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) [2021-11-09 10:48:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:16,536 INFO L93 Difference]: Finished difference Result 733 states and 899 transitions. [2021-11-09 10:48:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:48:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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 59 [2021-11-09 10:48:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:16,540 INFO L225 Difference]: With dead ends: 733 [2021-11-09 10:48:16,540 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 10:48:16,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=695, Invalid=5157, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 10:48:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 10:48:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 395. [2021-11-09 10:48:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 323 states have (on average 1.498452012383901) internal successors, (484), 391 states have internal predecessors, (484), 2 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) [2021-11-09 10:48:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 487 transitions. [2021-11-09 10:48:16,550 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 487 transitions. Word has length 59 [2021-11-09 10:48:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:16,550 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 487 transitions. [2021-11-09 10:48:16,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 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) [2021-11-09 10:48:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 487 transitions. [2021-11-09 10:48:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:48:16,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:16,552 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:16,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:16,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 10:48:16,764 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr103REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash -342249599, now seen corresponding path program 1 times [2021-11-09 10:48:16,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:16,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761977300] [2021-11-09 10:48:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:16,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:48:17,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:17,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761977300] [2021-11-09 10:48:17,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761977300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:17,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:17,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-09 10:48:17,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543503418] [2021-11-09 10:48:17,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:48:17,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:48:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:48:17,379 INFO L87 Difference]: Start difference. First operand 395 states and 487 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-11-09 10:48:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:19,929 INFO L93 Difference]: Finished difference Result 437 states and 530 transitions. [2021-11-09 10:48:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:48:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 60 [2021-11-09 10:48:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:19,932 INFO L225 Difference]: With dead ends: 437 [2021-11-09 10:48:19,932 INFO L226 Difference]: Without dead ends: 437 [2021-11-09 10:48:19,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:48:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-09 10:48:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 395. [2021-11-09 10:48:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 323 states have (on average 1.4953560371517027) internal successors, (483), 391 states have internal predecessors, (483), 2 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) [2021-11-09 10:48:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 486 transitions. [2021-11-09 10:48:19,941 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 486 transitions. Word has length 60 [2021-11-09 10:48:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:19,942 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 486 transitions. [2021-11-09 10:48:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-11-09 10:48:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 486 transitions. [2021-11-09 10:48:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:48:19,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:19,943 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-09 10:48:19,944 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr104REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -342249598, now seen corresponding path program 1 times [2021-11-09 10:48:19,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:19,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731191135] [2021-11-09 10:48:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:19,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:48:20,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:20,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731191135] [2021-11-09 10:48:20,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731191135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:20,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:20,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-09 10:48:20,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388910957] [2021-11-09 10:48:20,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:48:20,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:48:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:48:20,802 INFO L87 Difference]: Start difference. First operand 395 states and 486 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-11-09 10:48:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:24,695 INFO L93 Difference]: Finished difference Result 531 states and 630 transitions. [2021-11-09 10:48:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:48:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 60 [2021-11-09 10:48:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:24,698 INFO L225 Difference]: With dead ends: 531 [2021-11-09 10:48:24,698 INFO L226 Difference]: Without dead ends: 531 [2021-11-09 10:48:24,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=257, Invalid=2095, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:48:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-09 10:48:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-11-09 10:48:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 323 states have (on average 1.4922600619195046) internal successors, (482), 391 states have internal predecessors, (482), 2 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) [2021-11-09 10:48:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 485 transitions. [2021-11-09 10:48:24,707 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 485 transitions. Word has length 60 [2021-11-09 10:48:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:24,708 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 485 transitions. [2021-11-09 10:48:24,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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) [2021-11-09 10:48:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 485 transitions. [2021-11-09 10:48:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:48:24,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:24,709 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:24,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-09 10:48:24,710 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr139REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2020149950, now seen corresponding path program 1 times [2021-11-09 10:48:24,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:24,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82520442] [2021-11-09 10:48:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:24,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:48:24,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:24,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82520442] [2021-11-09 10:48:24,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82520442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:24,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:24,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 10:48:24,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112561879] [2021-11-09 10:48:24,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:48:24,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:48:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:48:24,864 INFO L87 Difference]: Start difference. First operand 395 states and 485 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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) [2021-11-09 10:48:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:25,485 INFO L93 Difference]: Finished difference Result 494 states and 550 transitions. [2021-11-09 10:48:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:48:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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 61 [2021-11-09 10:48:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:25,487 INFO L225 Difference]: With dead ends: 494 [2021-11-09 10:48:25,488 INFO L226 Difference]: Without dead ends: 494 [2021-11-09 10:48:25,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:48:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-09 10:48:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 395. [2021-11-09 10:48:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 323 states have (on average 1.4891640866873066) internal successors, (481), 391 states have internal predecessors, (481), 2 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) [2021-11-09 10:48:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 484 transitions. [2021-11-09 10:48:25,497 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 484 transitions. Word has length 61 [2021-11-09 10:48:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:25,497 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 484 transitions. [2021-11-09 10:48:25,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 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) [2021-11-09 10:48:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 484 transitions. [2021-11-09 10:48:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:25,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:25,499 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:25,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-09 10:48:25,499 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1161251878, now seen corresponding path program 1 times [2021-11-09 10:48:25,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:25,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095420392] [2021-11-09 10:48:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:25,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:26,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:26,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095420392] [2021-11-09 10:48:26,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095420392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596312431] [2021-11-09 10:48:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:26,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:26,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:26,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:48:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:48:27,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:27,577 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 [2021-11-09 10:48:27,581 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 [2021-11-09 10:48:27,705 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:48:27,706 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 29 treesize of output 29 [2021-11-09 10:48:27,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:48:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-09 10:48:27,838 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:48:27,838 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 [2021-11-09 10:48:27,848 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 [2021-11-09 10:48:27,948 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 28 treesize of output 24 [2021-11-09 10:48:27,958 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 17 treesize of output 13 [2021-11-09 10:48:28,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:48:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:48:28,188 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-09 10:48:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-11-09 10:48:28,271 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:48:28,271 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 48 treesize of output 47 [2021-11-09 10:48:28,291 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 10:48:28,292 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 53 treesize of output 52 [2021-11-09 10:48:28,413 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:28,414 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-11-09 10:48:28,430 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:48:28,430 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 62 treesize of output 64 [2021-11-09 10:48:28,601 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:48:28,601 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 75 treesize of output 77 [2021-11-09 10:48:28,617 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:28,618 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2021-11-09 10:48:28,829 INFO L354 Elim1Store]: treesize reduction 110, result has 16.0 percent of original size [2021-11-09 10:48:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 83 [2021-11-09 10:48:28,851 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-09 10:48:28,851 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 5 case distinctions, treesize of input 74 treesize of output 63 [2021-11-09 10:48:29,171 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:29,172 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 81 treesize of output 79 [2021-11-09 10:48:29,194 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:29,194 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 68 treesize of output 62 [2021-11-09 10:48:29,652 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:29,653 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 81 treesize of output 75 [2021-11-09 10:48:29,678 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:48:29,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2021-11-09 10:48:29,833 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:29,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2021-11-09 10:48:29,839 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:29,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 32 [2021-11-09 10:48:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:29,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596312431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:29,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:29,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [20] total 35 [2021-11-09 10:48:29,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383868795] [2021-11-09 10:48:29,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:48:29,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:48:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:48:29,938 INFO L87 Difference]: Start difference. First operand 395 states and 484 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:33,444 INFO L93 Difference]: Finished difference Result 438 states and 535 transitions. [2021-11-09 10:48:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:48:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 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 63 [2021-11-09 10:48:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:33,447 INFO L225 Difference]: With dead ends: 438 [2021-11-09 10:48:33,447 INFO L226 Difference]: Without dead ends: 438 [2021-11-09 10:48:33,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:48:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-09 10:48:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 405. [2021-11-09 10:48:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 333 states have (on average 1.4924924924924925) internal successors, (497), 401 states have internal predecessors, (497), 2 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) [2021-11-09 10:48:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 500 transitions. [2021-11-09 10:48:33,456 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 500 transitions. Word has length 63 [2021-11-09 10:48:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:33,457 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 500 transitions. [2021-11-09 10:48:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 500 transitions. [2021-11-09 10:48:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:33,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:33,459 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:33,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:33,660 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr44REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1161251877, now seen corresponding path program 1 times [2021-11-09 10:48:33,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:33,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513919689] [2021-11-09 10:48:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:33,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:48:33,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:33,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513919689] [2021-11-09 10:48:33,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513919689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:33,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:33,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:33,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082477779] [2021-11-09 10:48:33,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:48:33,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:48:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:48:33,798 INFO L87 Difference]: Start difference. First operand 405 states and 500 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2021-11-09 10:48:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:34,468 INFO L93 Difference]: Finished difference Result 410 states and 502 transitions. [2021-11-09 10:48:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:48:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 63 [2021-11-09 10:48:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:34,471 INFO L225 Difference]: With dead ends: 410 [2021-11-09 10:48:34,471 INFO L226 Difference]: Without dead ends: 410 [2021-11-09 10:48:34,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:48:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-09 10:48:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 405. [2021-11-09 10:48:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 333 states have (on average 1.4894894894894894) internal successors, (496), 401 states have internal predecessors, (496), 2 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) [2021-11-09 10:48:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 499 transitions. [2021-11-09 10:48:34,480 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 499 transitions. Word has length 63 [2021-11-09 10:48:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:34,480 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 499 transitions. [2021-11-09 10:48:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2021-11-09 10:48:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 499 transitions. [2021-11-09 10:48:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:48:34,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:34,482 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:34,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-09 10:48:34,482 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr109REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash 551741131, now seen corresponding path program 1 times [2021-11-09 10:48:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:34,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236500512] [2021-11-09 10:48:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:34,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:48:34,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:34,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236500512] [2021-11-09 10:48:34,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236500512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:34,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:34,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:48:34,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188424483] [2021-11-09 10:48:34,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:48:34,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:48:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:48:34,592 INFO L87 Difference]: Start difference. First operand 405 states and 499 transitions. Second operand has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-09 10:48:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:35,242 INFO L93 Difference]: Finished difference Result 466 states and 574 transitions. [2021-11-09 10:48:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:48:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 64 [2021-11-09 10:48:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:35,245 INFO L225 Difference]: With dead ends: 466 [2021-11-09 10:48:35,246 INFO L226 Difference]: Without dead ends: 466 [2021-11-09 10:48:35,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:48:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-09 10:48:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 415. [2021-11-09 10:48:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 343 states have (on average 1.4868804664723032) internal successors, (510), 411 states have internal predecessors, (510), 2 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) [2021-11-09 10:48:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 513 transitions. [2021-11-09 10:48:35,255 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 513 transitions. Word has length 64 [2021-11-09 10:48:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:35,256 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 513 transitions. [2021-11-09 10:48:35,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-09 10:48:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 513 transitions. [2021-11-09 10:48:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:48:35,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:35,258 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:35,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-09 10:48:35,258 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr110REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash 551741132, now seen corresponding path program 1 times [2021-11-09 10:48:35,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:35,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4578066] [2021-11-09 10:48:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:35,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:35,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:48:35,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:35,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4578066] [2021-11-09 10:48:35,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4578066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:35,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:35,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 10:48:35,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358212348] [2021-11-09 10:48:35,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:48:35,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:48:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:48:35,839 INFO L87 Difference]: Start difference. First operand 415 states and 513 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2021-11-09 10:48:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:37,753 INFO L93 Difference]: Finished difference Result 532 states and 601 transitions. [2021-11-09 10:48:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:48:37,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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 64 [2021-11-09 10:48:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:37,757 INFO L225 Difference]: With dead ends: 532 [2021-11-09 10:48:37,757 INFO L226 Difference]: Without dead ends: 532 [2021-11-09 10:48:37,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:48:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-09 10:48:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-11-09 10:48:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 343 states have (on average 1.4839650145772594) internal successors, (509), 411 states have internal predecessors, (509), 2 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) [2021-11-09 10:48:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 512 transitions. [2021-11-09 10:48:37,788 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 512 transitions. Word has length 64 [2021-11-09 10:48:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:37,789 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 512 transitions. [2021-11-09 10:48:37,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2021-11-09 10:48:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 512 transitions. [2021-11-09 10:48:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:48:37,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:37,804 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:37,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-09 10:48:37,804 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr139REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1941451615, now seen corresponding path program 1 times [2021-11-09 10:48:37,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:37,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717378023] [2021-11-09 10:48:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:37,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:48:37,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:37,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717378023] [2021-11-09 10:48:37,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717378023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:37,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:37,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:48:37,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677321832] [2021-11-09 10:48:37,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:48:37,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:48:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:48:37,945 INFO L87 Difference]: Start difference. First operand 415 states and 512 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2021-11-09 10:48:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:38,602 INFO L93 Difference]: Finished difference Result 501 states and 610 transitions. [2021-11-09 10:48:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:48:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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 66 [2021-11-09 10:48:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:38,605 INFO L225 Difference]: With dead ends: 501 [2021-11-09 10:48:38,606 INFO L226 Difference]: Without dead ends: 501 [2021-11-09 10:48:38,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:48:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-09 10:48:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 465. [2021-11-09 10:48:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 393 states have (on average 1.4860050890585241) internal successors, (584), 461 states have internal predecessors, (584), 2 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) [2021-11-09 10:48:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 587 transitions. [2021-11-09 10:48:38,614 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 587 transitions. Word has length 66 [2021-11-09 10:48:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:38,615 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 587 transitions. [2021-11-09 10:48:38,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2021-11-09 10:48:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 587 transitions. [2021-11-09 10:48:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:48:38,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:38,616 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:38,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-09 10:48:38,617 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr62REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1975024740, now seen corresponding path program 2 times [2021-11-09 10:48:38,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:38,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125246871] [2021-11-09 10:48:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:38,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:48:39,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:39,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125246871] [2021-11-09 10:48:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125246871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:39,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575829164] [2021-11-09 10:48:39,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:39,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:39,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:39,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:39,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:48:40,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 10:48:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:48:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:48:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:48:40,345 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:48:40,345 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 21 treesize of output 20 [2021-11-09 10:48:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:40,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:48:40,434 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:48:40,434 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 21 treesize of output 20 [2021-11-09 10:48:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:40,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:48:40,579 INFO L354 Elim1Store]: treesize reduction 42, result has 43.2 percent of original size [2021-11-09 10:48:40,579 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 79 [2021-11-09 10:48:40,602 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-09 10:48:40,602 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 74 [2021-11-09 10:48:41,542 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 73 treesize of output 72 [2021-11-09 10:48:42,449 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 10:48:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 85 [2021-11-09 10:48:42,454 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 10:48:42,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2021-11-09 10:48:42,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:48:42,462 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 45 treesize of output 45 [2021-11-09 10:48:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:48:42,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575829164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:42,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:42,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-09 10:48:42,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108323371] [2021-11-09 10:48:42,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:48:42,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:48:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:48:42,558 INFO L87 Difference]: Start difference. First operand 465 states and 587 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:43,516 INFO L93 Difference]: Finished difference Result 473 states and 595 transitions. [2021-11-09 10:48:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:43,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (2), 1 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 66 [2021-11-09 10:48:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:43,518 INFO L225 Difference]: With dead ends: 473 [2021-11-09 10:48:43,519 INFO L226 Difference]: Without dead ends: 473 [2021-11-09 10:48:43,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:48:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-09 10:48:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 461. [2021-11-09 10:48:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 389 states have (on average 1.4910025706940875) internal successors, (580), 457 states have internal predecessors, (580), 2 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) [2021-11-09 10:48:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 583 transitions. [2021-11-09 10:48:43,527 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 583 transitions. Word has length 66 [2021-11-09 10:48:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:43,528 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 583 transitions. [2021-11-09 10:48:43,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 583 transitions. [2021-11-09 10:48:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:48:43,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:43,529 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:43,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:43,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:43,743 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:48:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1857994915, now seen corresponding path program 1 times [2021-11-09 10:48:43,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:43,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697089123] [2021-11-09 10:48:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:43,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:45,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697089123] [2021-11-09 10:48:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697089123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068329878] [2021-11-09 10:48:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:45,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:45,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:45,644 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:48:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 10:48:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:46,789 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 [2021-11-09 10:48:46,816 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 [2021-11-09 10:48:46,824 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 [2021-11-09 10:48:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 10:48:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:46,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 10:48:46,905 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:48:46,905 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 [2021-11-09 10:48:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:47,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 58 [2021-11-09 10:48:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:47,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 59 [2021-11-09 10:48:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:47,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:47,135 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:48:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 71 [2021-11-09 10:48:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:47,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:47,147 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 10:48:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 71 [2021-11-09 10:48:47,367 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:48:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:48:47,586 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:48:47,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2021-11-09 10:48:47,601 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 10:48:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 88 [2021-11-09 10:48:47,912 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-09 10:48:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 89 [2021-11-09 10:48:47,935 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-09 10:48:47,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 91 [2021-11-09 10:48:48,087 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-09 10:48:48,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 10:48:48,390 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-09 10:48:48,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 125 treesize of output 109 [2021-11-09 10:48:48,408 INFO L354 Elim1Store]: treesize reduction 83, result has 13.5 percent of original size [2021-11-09 10:48:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 138 treesize of output 143 [2021-11-09 10:48:48,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:48,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:48,633 INFO L354 Elim1Store]: treesize reduction 124, result has 14.5 percent of original size [2021-11-09 10:48:48,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 141 [2021-11-09 10:48:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:48,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:48,657 INFO L354 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2021-11-09 10:48:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 230 treesize of output 237 [2021-11-09 10:48:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:49,206 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:48:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 28 [2021-11-09 10:48:49,449 INFO L354 Elim1Store]: treesize reduction 184, result has 14.0 percent of original size [2021-11-09 10:48:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 203 treesize of output 213 [2021-11-09 10:48:49,505 INFO L354 Elim1Store]: treesize reduction 162, result has 14.7 percent of original size [2021-11-09 10:48:49,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 199 treesize of output 143 [2021-11-09 10:48:50,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,077 INFO L354 Elim1Store]: treesize reduction 332, result has 12.2 percent of original size [2021-11-09 10:48:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 303 [2021-11-09 10:48:50,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,134 INFO L354 Elim1Store]: treesize reduction 152, result has 12.6 percent of original size [2021-11-09 10:48:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 281 treesize of output 154 [2021-11-09 10:48:50,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,784 INFO L354 Elim1Store]: treesize reduction 332, result has 12.2 percent of original size [2021-11-09 10:48:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 303 [2021-11-09 10:48:50,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:50,830 INFO L354 Elim1Store]: treesize reduction 152, result has 12.6 percent of original size [2021-11-09 10:48:50,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 281 treesize of output 154 [2021-11-09 10:48:51,490 INFO L354 Elim1Store]: treesize reduction 290, result has 10.8 percent of original size [2021-11-09 10:48:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 318 treesize of output 179 [2021-11-09 10:48:51,556 INFO L354 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-11-09 10:48:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 222 treesize of output 226 [2021-11-09 10:48:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:52,382 INFO L354 Elim1Store]: treesize reduction 350, result has 8.1 percent of original size [2021-11-09 10:48:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 25 case distinctions, treesize of input 249 treesize of output 182 [2021-11-09 10:48:52,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,498 INFO L354 Elim1Store]: treesize reduction 396, result has 8.5 percent of original size [2021-11-09 10:48:52,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 241 treesize of output 244 [2021-11-09 10:48:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:53,877 INFO L354 Elim1Store]: treesize reduction 191, result has 5.9 percent of original size [2021-11-09 10:48:53,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 241 treesize of output 122 [2021-11-09 10:48:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:54,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:54,267 INFO L354 Elim1Store]: treesize reduction 312, result has 9.0 percent of original size [2021-11-09 10:48:54,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 130 treesize of output 132 [2021-11-09 10:48:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068329878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:54,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:54,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 50 [2021-11-09 10:48:54,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220103388] [2021-11-09 10:48:54,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 10:48:54,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 10:48:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:48:54,625 INFO L87 Difference]: Start difference. First operand 461 states and 583 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2021-11-09 10:49:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:09,995 INFO L93 Difference]: Finished difference Result 535 states and 662 transitions. [2021-11-09 10:49:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:49:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 67 [2021-11-09 10:49:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:09,998 INFO L225 Difference]: With dead ends: 535 [2021-11-09 10:49:09,998 INFO L226 Difference]: Without dead ends: 535 [2021-11-09 10:49:09,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=603, Invalid=5717, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 10:49:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-09 10:49:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 455. [2021-11-09 10:49:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 383 states have (on average 1.485639686684073) internal successors, (569), 451 states have internal predecessors, (569), 2 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) [2021-11-09 10:49:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 572 transitions. [2021-11-09 10:49:10,006 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 572 transitions. Word has length 67 [2021-11-09 10:49:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:10,007 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 572 transitions. [2021-11-09 10:49:10,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2021-11-09 10:49:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 572 transitions. [2021-11-09 10:49:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:49:10,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:10,008 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:10,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-09 10:49:10,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:10,208 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash 49827309, now seen corresponding path program 1 times [2021-11-09 10:49:10,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:10,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320168405] [2021-11-09 10:49:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:10,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:11,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:11,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320168405] [2021-11-09 10:49:11,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320168405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:11,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687781924] [2021-11-09 10:49:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:11,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:11,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:11,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:11,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:49:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 10:49:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:12,913 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 [2021-11-09 10:49:12,997 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 [2021-11-09 10:49:13,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:49:13,132 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:49:13,132 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 [2021-11-09 10:49:13,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:49:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:49:13,377 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:49:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2021-11-09 10:49:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-11-09 10:49:13,454 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-09 10:49:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-09 10:49:13,640 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-09 10:49:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 70 [2021-11-09 10:49:13,655 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-09 10:49:13,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 67 [2021-11-09 10:49:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:13,797 INFO L354 Elim1Store]: treesize reduction 98, result has 17.6 percent of original size [2021-11-09 10:49:13,797 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 109 treesize of output 101 [2021-11-09 10:49:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:13,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:13,828 INFO L354 Elim1Store]: treesize reduction 112, result has 18.2 percent of original size [2021-11-09 10:49:13,829 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 126 treesize of output 130 [2021-11-09 10:49:14,184 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-09 10:49:14,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-11-09 10:49:14,317 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-09 10:49:14,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 116 [2021-11-09 10:49:14,366 INFO L354 Elim1Store]: treesize reduction 264, result has 16.7 percent of original size [2021-11-09 10:49:14,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 190 [2021-11-09 10:49:14,644 INFO L354 Elim1Store]: treesize reduction 372, result has 13.9 percent of original size [2021-11-09 10:49:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 209 treesize of output 215 [2021-11-09 10:49:14,699 INFO L354 Elim1Store]: treesize reduction 224, result has 13.8 percent of original size [2021-11-09 10:49:14,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 127 [2021-11-09 10:49:15,169 INFO L354 Elim1Store]: treesize reduction 372, result has 13.9 percent of original size [2021-11-09 10:49:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 209 treesize of output 215 [2021-11-09 10:49:15,228 INFO L354 Elim1Store]: treesize reduction 224, result has 13.8 percent of original size [2021-11-09 10:49:15,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 127 [2021-11-09 10:49:15,722 INFO L354 Elim1Store]: treesize reduction 322, result has 9.0 percent of original size [2021-11-09 10:49:15,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 233 treesize of output 142 [2021-11-09 10:49:15,816 INFO L354 Elim1Store]: treesize reduction 324, result has 12.0 percent of original size [2021-11-09 10:49:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 151 treesize of output 156 [2021-11-09 10:49:16,453 INFO L354 Elim1Store]: treesize reduction 266, result has 13.6 percent of original size [2021-11-09 10:49:16,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 141 [2021-11-09 10:49:16,524 INFO L354 Elim1Store]: treesize reduction 276, result has 13.8 percent of original size [2021-11-09 10:49:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 153 [2021-11-09 10:49:17,213 INFO L354 Elim1Store]: treesize reduction 276, result has 13.8 percent of original size [2021-11-09 10:49:17,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 166 [2021-11-09 10:49:17,272 INFO L354 Elim1Store]: treesize reduction 266, result has 13.6 percent of original size [2021-11-09 10:49:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 128 [2021-11-09 10:49:17,740 INFO L354 Elim1Store]: treesize reduction 210, result has 1.4 percent of original size [2021-11-09 10:49:17,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 100 [2021-11-09 10:49:17,783 INFO L354 Elim1Store]: treesize reduction 146, result has 2.0 percent of original size [2021-11-09 10:49:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 56 [2021-11-09 10:49:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687781924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:17,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:17,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2021-11-09 10:49:17,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539941553] [2021-11-09 10:49:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:49:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:49:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:49:17,808 INFO L87 Difference]: Start difference. First operand 455 states and 572 transitions. Second operand has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 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) [2021-11-09 10:49:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:26,044 INFO L93 Difference]: Finished difference Result 536 states and 660 transitions. [2021-11-09 10:49:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:49:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 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 67 [2021-11-09 10:49:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:26,047 INFO L225 Difference]: With dead ends: 536 [2021-11-09 10:49:26,047 INFO L226 Difference]: Without dead ends: 536 [2021-11-09 10:49:26,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:49:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-09 10:49:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2021-11-09 10:49:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 429 states have (on average 1.4405594405594406) internal successors, (618), 497 states have internal predecessors, (618), 2 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) [2021-11-09 10:49:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 621 transitions. [2021-11-09 10:49:26,055 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 621 transitions. Word has length 67 [2021-11-09 10:49:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 621 transitions. [2021-11-09 10:49:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 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) [2021-11-09 10:49:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 621 transitions. [2021-11-09 10:49:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:49:26,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:26,057 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:26,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:26,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:26,283 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr123REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1725828425, now seen corresponding path program 1 times [2021-11-09 10:49:26,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:26,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574984332] [2021-11-09 10:49:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:26,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:49:27,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:27,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574984332] [2021-11-09 10:49:27,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574984332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:27,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:27,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-09 10:49:27,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790601128] [2021-11-09 10:49:27,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:49:27,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:49:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:49:27,475 INFO L87 Difference]: Start difference. First operand 501 states and 621 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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) [2021-11-09 10:49:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:31,437 INFO L93 Difference]: Finished difference Result 538 states and 660 transitions. [2021-11-09 10:49:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:49:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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 68 [2021-11-09 10:49:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:31,440 INFO L225 Difference]: With dead ends: 538 [2021-11-09 10:49:31,440 INFO L226 Difference]: Without dead ends: 538 [2021-11-09 10:49:31,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:49:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-09 10:49:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 501. [2021-11-09 10:49:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 429 states have (on average 1.4382284382284383) internal successors, (617), 497 states have internal predecessors, (617), 2 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) [2021-11-09 10:49:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 620 transitions. [2021-11-09 10:49:31,448 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 620 transitions. Word has length 68 [2021-11-09 10:49:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:31,448 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 620 transitions. [2021-11-09 10:49:31,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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) [2021-11-09 10:49:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 620 transitions. [2021-11-09 10:49:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:49:31,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:31,450 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-09 10:49:31,450 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr115REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1798179629, now seen corresponding path program 1 times [2021-11-09 10:49:31,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:31,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164225943] [2021-11-09 10:49:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:31,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:32,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:49:32,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:32,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164225943] [2021-11-09 10:49:32,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164225943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:32,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711166391] [2021-11-09 10:49:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:32,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:32,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:32,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:32,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:49:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:49:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:34,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:49:34,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:49:34,468 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:49:34,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 10:49:34,479 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 10:49:34,479 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 101 treesize of output 100 [2021-11-09 10:49:34,738 INFO L354 Elim1Store]: treesize reduction 64, result has 17.9 percent of original size [2021-11-09 10:49:34,740 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 2 case distinctions, treesize of input 137 treesize of output 135 [2021-11-09 10:49:34,753 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-11-09 10:49:34,754 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 165 treesize of output 154 [2021-11-09 10:49:34,769 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:49:34,770 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 242 treesize of output 234 [2021-11-09 10:49:34,798 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:49:34,799 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 306 treesize of output 310 [2021-11-09 10:49:35,639 INFO L354 Elim1Store]: treesize reduction 64, result has 17.9 percent of original size [2021-11-09 10:49:35,640 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 2 case distinctions, treesize of input 137 treesize of output 135 [2021-11-09 10:49:35,657 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-11-09 10:49:35,657 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 165 treesize of output 154 [2021-11-09 10:49:35,672 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:49:35,673 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 242 treesize of output 234 [2021-11-09 10:49:35,687 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:49:35,688 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 258 treesize of output 262 [2021-11-09 10:49:36,038 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-09 10:49:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 125 [2021-11-09 10:49:36,078 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 10:49:36,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 146 [2021-11-09 10:49:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 180 [2021-11-09 10:49:36,095 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-09 10:49:36,095 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 180 treesize of output 175 [2021-11-09 10:49:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 177 [2021-11-09 10:49:36,109 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-09 10:49:36,110 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 177 treesize of output 174 [2021-11-09 10:49:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:49:36,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711166391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:36,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:36,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [23] total 29 [2021-11-09 10:49:36,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335277170] [2021-11-09 10:49:36,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:49:36,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:49:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:49:36,275 INFO L87 Difference]: Start difference. First operand 501 states and 620 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:49:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:38,178 INFO L93 Difference]: Finished difference Result 572 states and 656 transitions. [2021-11-09 10:49:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:49:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (2), 1 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 68 [2021-11-09 10:49:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:38,183 INFO L225 Difference]: With dead ends: 572 [2021-11-09 10:49:38,183 INFO L226 Difference]: Without dead ends: 572 [2021-11-09 10:49:38,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 20 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:49:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-09 10:49:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 497. [2021-11-09 10:49:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 425 states have (on average 1.4352941176470588) internal successors, (610), 493 states have internal predecessors, (610), 2 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) [2021-11-09 10:49:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 613 transitions. [2021-11-09 10:49:38,193 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 613 transitions. Word has length 68 [2021-11-09 10:49:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:38,194 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 613 transitions. [2021-11-09 10:49:38,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:49:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 613 transitions. [2021-11-09 10:49:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 10:49:38,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:38,196 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:38,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 10:49:38,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-09 10:49:38,411 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr62REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1425484446, now seen corresponding path program 1 times [2021-11-09 10:49:38,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:38,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037697423] [2021-11-09 10:49:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:38,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:49:38,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:38,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037697423] [2021-11-09 10:49:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037697423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:38,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:38,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:49:38,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382988676] [2021-11-09 10:49:38,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:38,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:38,556 INFO L87 Difference]: Start difference. First operand 497 states and 613 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-09 10:49:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:38,995 INFO L93 Difference]: Finished difference Result 498 states and 612 transitions. [2021-11-09 10:49:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 70 [2021-11-09 10:49:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:38,999 INFO L225 Difference]: With dead ends: 498 [2021-11-09 10:49:38,999 INFO L226 Difference]: Without dead ends: 498 [2021-11-09 10:49:38,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-09 10:49:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 497. [2021-11-09 10:49:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 425 states have (on average 1.4305882352941177) internal successors, (608), 493 states have internal predecessors, (608), 2 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) [2021-11-09 10:49:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 611 transitions. [2021-11-09 10:49:39,006 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 611 transitions. Word has length 70 [2021-11-09 10:49:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:39,006 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 611 transitions. [2021-11-09 10:49:39,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-09 10:49:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 611 transitions. [2021-11-09 10:49:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:49:39,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:39,007 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:39,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-09 10:49:39,008 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1662980003, now seen corresponding path program 1 times [2021-11-09 10:49:39,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:39,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830363729] [2021-11-09 10:49:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:39,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:49:39,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830363729] [2021-11-09 10:49:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830363729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:39,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:49:39,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725405364] [2021-11-09 10:49:39,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:39,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:39,115 INFO L87 Difference]: Start difference. First operand 497 states and 611 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-09 10:49:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:39,544 INFO L93 Difference]: Finished difference Result 503 states and 618 transitions. [2021-11-09 10:49:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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 72 [2021-11-09 10:49:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:39,547 INFO L225 Difference]: With dead ends: 503 [2021-11-09 10:49:39,547 INFO L226 Difference]: Without dead ends: 503 [2021-11-09 10:49:39,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-09 10:49:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2021-11-09 10:49:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 429 states have (on average 1.4289044289044288) internal successors, (613), 497 states have internal predecessors, (613), 2 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) [2021-11-09 10:49:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 616 transitions. [2021-11-09 10:49:39,555 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 616 transitions. Word has length 72 [2021-11-09 10:49:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:39,555 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 616 transitions. [2021-11-09 10:49:39,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-09 10:49:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 616 transitions. [2021-11-09 10:49:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:49:39,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:39,556 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:39,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-09 10:49:39,557 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr123REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1353680858, now seen corresponding path program 1 times [2021-11-09 10:49:39,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:39,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767492678] [2021-11-09 10:49:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:39,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:49:39,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:39,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767492678] [2021-11-09 10:49:39,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767492678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:39,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:39,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:49:39,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086949759] [2021-11-09 10:49:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:39,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:39,729 INFO L87 Difference]: Start difference. First operand 501 states and 616 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-11-09 10:49:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:40,159 INFO L93 Difference]: Finished difference Result 499 states and 607 transitions. [2021-11-09 10:49:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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 73 [2021-11-09 10:49:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:40,162 INFO L225 Difference]: With dead ends: 499 [2021-11-09 10:49:40,162 INFO L226 Difference]: Without dead ends: 499 [2021-11-09 10:49:40,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-09 10:49:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 495. [2021-11-09 10:49:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 423 states have (on average 1.4184397163120568) internal successors, (600), 491 states have internal predecessors, (600), 2 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) [2021-11-09 10:49:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 603 transitions. [2021-11-09 10:49:40,170 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 603 transitions. Word has length 73 [2021-11-09 10:49:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:40,170 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 603 transitions. [2021-11-09 10:49:40,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-11-09 10:49:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 603 transitions. [2021-11-09 10:49:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 10:49:40,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:40,172 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:40,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-09 10:49:40,172 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr143REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1841314093, now seen corresponding path program 1 times [2021-11-09 10:49:40,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:40,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654801008] [2021-11-09 10:49:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:40,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:41,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:41,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654801008] [2021-11-09 10:49:41,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654801008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:41,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076445490] [2021-11-09 10:49:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:41,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:41,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:49:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:49:42,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:42,857 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-09 10:49:42,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-11-09 10:49:43,000 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:49:43,001 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 [2021-11-09 10:49:43,103 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 10:49:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 10:49:43,242 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 10:49:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 10:49:43,495 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:49:43,495 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 [2021-11-09 10:49:43,636 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-09 10:49:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-11-09 10:49:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-09 10:49:43,788 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-09 10:49:43,788 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 16 treesize of output 18 [2021-11-09 10:49:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:49:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076445490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:43,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:43,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [27] total 35 [2021-11-09 10:49:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411495981] [2021-11-09 10:49:43,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:49:43,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:49:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:49:43,885 INFO L87 Difference]: Start difference. First operand 495 states and 603 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 2 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) [2021-11-09 10:49:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:45,031 INFO L93 Difference]: Finished difference Result 833 states and 1013 transitions. [2021-11-09 10:49:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:49:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 2 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 76 [2021-11-09 10:49:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:45,036 INFO L225 Difference]: With dead ends: 833 [2021-11-09 10:49:45,036 INFO L226 Difference]: Without dead ends: 833 [2021-11-09 10:49:45,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=1747, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:49:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-09 10:49:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 580. [2021-11-09 10:49:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 508 states have (on average 1.4271653543307086) internal successors, (725), 576 states have internal predecessors, (725), 2 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) [2021-11-09 10:49:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 728 transitions. [2021-11-09 10:49:45,049 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 728 transitions. Word has length 76 [2021-11-09 10:49:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:45,049 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 728 transitions. [2021-11-09 10:49:45,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 2 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) [2021-11-09 10:49:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 728 transitions. [2021-11-09 10:49:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:49:45,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:45,051 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:45,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:45,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 10:49:45,278 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:49:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash -656365457, now seen corresponding path program 2 times [2021-11-09 10:49:45,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:45,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927470125] [2021-11-09 10:49:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:45,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:47,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:47,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927470125] [2021-11-09 10:49:47,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927470125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923409025] [2021-11-09 10:49:47,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:47,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:47,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:47,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:49:49,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:49,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 10:49:49,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:49,250 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 [2021-11-09 10:49:49,275 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:49:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:49:49,371 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:49:49,371 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 17 treesize of output 22 [2021-11-09 10:49:49,457 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 17 treesize of output 13 [2021-11-09 10:49:49,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:49,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 10:49:49,731 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-09 10:49:49,732 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 35 treesize of output 61 [2021-11-09 10:49:49,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-09 10:49:50,027 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:49:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-09 10:49:50,234 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-09 10:49:50,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-09 10:49:50,494 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-09 10:49:50,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 73 [2021-11-09 10:49:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:50,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:50,849 INFO L354 Elim1Store]: treesize reduction 100, result has 14.5 percent of original size [2021-11-09 10:49:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 118 treesize of output 93 [2021-11-09 10:49:50,890 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 [2021-11-09 10:49:51,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:51,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:51,401 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-11-09 10:49:51,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 70 [2021-11-09 10:49:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:51,685 INFO L354 Elim1Store]: treesize reduction 140, result has 19.5 percent of original size [2021-11-09 10:49:51,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 154 treesize of output 113 [2021-11-09 10:49:52,463 INFO L354 Elim1Store]: treesize reduction 422, result has 13.2 percent of original size [2021-11-09 10:49:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 308 treesize of output 182 [2021-11-09 10:49:52,484 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:49:52,485 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 182 treesize of output 176 [2021-11-09 10:49:53,901 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:49:53,902 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 317 treesize of output 311 [2021-11-09 10:49:54,045 INFO L354 Elim1Store]: treesize reduction 474, result has 12.5 percent of original size [2021-11-09 10:49:54,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 35 case distinctions, treesize of input 311 treesize of output 187 [2021-11-09 10:49:55,383 INFO L354 Elim1Store]: treesize reduction 384, result has 15.6 percent of original size [2021-11-09 10:49:55,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 320 treesize of output 195 [2021-11-09 10:49:55,417 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-09 10:49:55,417 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 5 case distinctions, treesize of input 195 treesize of output 180 [2021-11-09 10:49:58,620 INFO L354 Elim1Store]: treesize reduction 450, result has 11.8 percent of original size [2021-11-09 10:49:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 230 treesize of output 177 [2021-11-09 10:49:58,641 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:49:58,641 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 177 treesize of output 175 [2021-11-09 10:50:07,656 INFO L354 Elim1Store]: treesize reduction 434, result has 13.7 percent of original size [2021-11-09 10:50:07,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 233 treesize of output 189 [2021-11-09 10:50:07,678 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:50:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 187 [2021-11-09 10:50:10,666 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 143 [2021-11-09 10:50:12,295 INFO L354 Elim1Store]: treesize reduction 260, result has 19.3 percent of original size [2021-11-09 10:50:12,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 197 treesize of output 150 [2021-11-09 10:50:15,069 INFO L354 Elim1Store]: treesize reduction 140, result has 11.9 percent of original size [2021-11-09 10:50:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 108 [2021-11-09 10:50:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:15,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923409025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:15,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:15,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34] total 71 [2021-11-09 10:50:15,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768603510] [2021-11-09 10:50:15,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 10:50:15,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 10:50:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=4708, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:50:15,363 INFO L87 Difference]: Start difference. First operand 580 states and 728 transitions. Second operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 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) [2021-11-09 10:52:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:52,303 INFO L93 Difference]: Finished difference Result 653 states and 810 transitions. [2021-11-09 10:52:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:52:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 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 78 [2021-11-09 10:52:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:52,307 INFO L225 Difference]: With dead ends: 653 [2021-11-09 10:52:52,308 INFO L226 Difference]: Without dead ends: 653 [2021-11-09 10:52:52,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=1741, Invalid=11803, Unknown=28, NotChecked=0, Total=13572 [2021-11-09 10:52:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-09 10:52:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 584. [2021-11-09 10:52:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 512 states have (on average 1.427734375) internal successors, (731), 580 states have internal predecessors, (731), 2 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) [2021-11-09 10:52:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 734 transitions. [2021-11-09 10:52:52,319 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 734 transitions. Word has length 78 [2021-11-09 10:52:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:52,319 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 734 transitions. [2021-11-09 10:52:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 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) [2021-11-09 10:52:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 734 transitions. [2021-11-09 10:52:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:52:52,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:52,320 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:52,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 10:52:52,521 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr51REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:52:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash -656365456, now seen corresponding path program 1 times [2021-11-09 10:52:52,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:52,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705823779] [2021-11-09 10:52:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:52,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:54,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:52:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:54,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:54,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705823779] [2021-11-09 10:52:54,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705823779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:54,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452469595] [2021-11-09 10:52:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:54,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:54,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:54,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:54,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:52:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 10:52:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:57,057 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 [2021-11-09 10:52:57,062 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 [2021-11-09 10:52:57,142 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:52:57,143 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 28 treesize of output 32 [2021-11-09 10:52:57,151 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:52:57,152 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 26 treesize of output 28 [2021-11-09 10:52:57,348 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:52:57,348 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 37 treesize of output 42 [2021-11-09 10:52:57,366 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:52:57,366 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 36 treesize of output 41 [2021-11-09 10:52:57,548 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 38 treesize of output 34 [2021-11-09 10:52:57,566 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 [2021-11-09 10:52:57,866 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-11-09 10:52:57,867 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 6 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 10:52:57,907 INFO L354 Elim1Store]: treesize reduction 108, result has 27.0 percent of original size [2021-11-09 10:52:57,907 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 69 treesize of output 93 [2021-11-09 10:52:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 51 [2021-11-09 10:52:58,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 10:52:58,439 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:52:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 54 [2021-11-09 10:52:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:58,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-09 10:52:58,683 INFO L354 Elim1Store]: treesize reduction 134, result has 26.8 percent of original size [2021-11-09 10:52:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 84 treesize of output 115 [2021-11-09 10:52:58,726 INFO L354 Elim1Store]: treesize reduction 118, result has 18.6 percent of original size [2021-11-09 10:52:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 100 treesize of output 111 [2021-11-09 10:52:59,076 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 10:52:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 140 [2021-11-09 10:52:59,091 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-09 10:52:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 113 [2021-11-09 10:52:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:59,423 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-09 10:52:59,424 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 199 treesize of output 155 [2021-11-09 10:52:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:59,458 INFO L354 Elim1Store]: treesize reduction 152, result has 15.1 percent of original size [2021-11-09 10:52:59,459 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 252 treesize of output 256 [2021-11-09 10:53:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:00,270 INFO L354 Elim1Store]: treesize reduction 96, result has 26.7 percent of original size [2021-11-09 10:53:00,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 136 treesize of output 136 [2021-11-09 10:53:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:00,313 INFO L354 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2021-11-09 10:53:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 118 treesize of output 132 [2021-11-09 10:53:00,625 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-09 10:53:00,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 262 treesize of output 172 [2021-11-09 10:53:00,688 INFO L354 Elim1Store]: treesize reduction 292, result has 15.4 percent of original size [2021-11-09 10:53:00,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 379 treesize of output 345 [2021-11-09 10:53:01,287 INFO L354 Elim1Store]: treesize reduction 240, result has 13.0 percent of original size [2021-11-09 10:53:01,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 401 treesize of output 199 [2021-11-09 10:53:01,357 INFO L354 Elim1Store]: treesize reduction 400, result has 13.0 percent of original size [2021-11-09 10:53:01,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 388 treesize of output 357 [2021-11-09 10:53:02,407 INFO L354 Elim1Store]: treesize reduction 240, result has 13.0 percent of original size [2021-11-09 10:53:02,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 401 treesize of output 199 [2021-11-09 10:53:02,485 INFO L354 Elim1Store]: treesize reduction 400, result has 13.0 percent of original size [2021-11-09 10:53:02,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 388 treesize of output 357 [2021-11-09 10:53:03,573 INFO L354 Elim1Store]: treesize reduction 338, result has 8.6 percent of original size [2021-11-09 10:53:03,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 425 treesize of output 201 [2021-11-09 10:53:03,677 INFO L354 Elim1Store]: treesize reduction 348, result has 10.3 percent of original size [2021-11-09 10:53:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 279 treesize of output 263 [2021-11-09 10:53:05,049 INFO L354 Elim1Store]: treesize reduction 296, result has 12.9 percent of original size [2021-11-09 10:53:05,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 277 [2021-11-09 10:53:05,117 INFO L354 Elim1Store]: treesize reduction 324, result has 12.9 percent of original size [2021-11-09 10:53:05,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 184 [2021-11-09 10:53:08,153 INFO L354 Elim1Store]: treesize reduction 324, result has 12.9 percent of original size [2021-11-09 10:53:08,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 197 [2021-11-09 10:53:08,221 INFO L354 Elim1Store]: treesize reduction 296, result has 12.9 percent of original size [2021-11-09 10:53:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 264 [2021-11-09 10:53:09,653 INFO L354 Elim1Store]: treesize reduction 442, result has 9.1 percent of original size [2021-11-09 10:53:09,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 312 treesize of output 202 [2021-11-09 10:53:09,739 INFO L354 Elim1Store]: treesize reduction 380, result has 9.5 percent of original size [2021-11-09 10:53:09,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 297 treesize of output 269 [2021-11-09 10:53:10,518 INFO L354 Elim1Store]: treesize reduction 156, result has 0.6 percent of original size [2021-11-09 10:53:10,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 287 treesize of output 139 [2021-11-09 10:53:10,533 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-09 10:53:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 106 [2021-11-09 10:53:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452469595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:10,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:10,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22] total 52 [2021-11-09 10:53:10,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124105666] [2021-11-09 10:53:10,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 10:53:10,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 10:53:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:53:10,863 INFO L87 Difference]: Start difference. First operand 584 states and 734 transitions. Second operand has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 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) [2021-11-09 10:53:53,459 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-09 10:53:53,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-09 10:53:53,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:53,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 10:53:53,664 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-11-09 10:53:53,667 INFO L168 Benchmark]: Toolchain (without parser) took 480175.82 ms. Allocated memory was 115.3 MB in the beginning and 687.9 MB in the end (delta: 572.5 MB). Free memory was 75.2 MB in the beginning and 202.9 MB in the end (delta: -127.7 MB). Peak memory consumption was 444.8 MB. Max. memory is 16.1 GB. [2021-11-09 10:53:53,668 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 115.3 MB. Free memory is still 93.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:53:53,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.79 ms. Allocated memory is still 115.3 MB. Free memory was 74.9 MB in the beginning and 80.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-11-09 10:53:53,668 INFO L168 Benchmark]: Boogie Preprocessor took 127.99 ms. Allocated memory is still 115.3 MB. Free memory was 80.5 MB in the beginning and 76.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-09 10:53:53,669 INFO L168 Benchmark]: RCFGBuilder took 1318.31 ms. Allocated memory is still 115.3 MB. Free memory was 76.7 MB in the beginning and 74.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. [2021-11-09 10:53:53,669 INFO L168 Benchmark]: TraceAbstraction took 478091.75 ms. Allocated memory was 115.3 MB in the beginning and 687.9 MB in the end (delta: 572.5 MB). Free memory was 73.8 MB in the beginning and 202.9 MB in the end (delta: -129.1 MB). Peak memory consumption was 443.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:53:53,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 115.3 MB. Free memory is still 93.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 629.79 ms. Allocated memory is still 115.3 MB. Free memory was 74.9 MB in the beginning and 80.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 127.99 ms. Allocated memory is still 115.3 MB. Free memory was 80.5 MB in the beginning and 76.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1318.31 ms. Allocated memory is still 115.3 MB. Free memory was 76.7 MB in the beginning and 74.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 478091.75 ms. Allocated memory was 115.3 MB in the beginning and 687.9 MB in the end (delta: 572.5 MB). Free memory was 73.8 MB in the beginning and 202.9 MB in the end (delta: -129.1 MB). Peak memory consumption was 443.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0521.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX --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 aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:53:56,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:53:56,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:53:56,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:53:56,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:53:56,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:53:56,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:53:56,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:53:56,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:53:56,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:53:56,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:53:56,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:53:56,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:53:56,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:53:56,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:53:56,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:53:56,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:53:56,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:53:56,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:53:56,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:53:56,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:53:56,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:53:56,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:53:56,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:53:56,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:53:56,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:53:56,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:53:56,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:53:56,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:53:56,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:53:56,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:53:56,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:53:56,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:53:56,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:53:56,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:53:56,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:53:56,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:53:56,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:53:56,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:53:56,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:53:56,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:53:56,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 10:53:56,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:53:56,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:53:56,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:53:56,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:53:56,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:53:56,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:53:56,642 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:53:56,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:53:56,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:53:56,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:53:56,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:53:56,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:53:56,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:53:56,646 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:53:56,646 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:53:56,647 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:53:56,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:53:56,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:53:56,647 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:53:56,648 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:53:56,648 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:53:56,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:53:56,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:53:56,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:53:56,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:53:56,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:53:56,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:53:56,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:53:56,650 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:53:56,651 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:53:56,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:53:56,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:53:56,652 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa94cb741c9c7eaa2ca9bb871f44dd4c619faf21975944b61e221a61ad9730d7 [2021-11-09 10:53:57,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:53:57,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:53:57,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:53:57,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:53:57,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:53:57,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety/test-0521.i [2021-11-09 10:53:57,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/c40258454/9abc2020ac064354929b93ef4a6b4273/FLAG270bbb680 [2021-11-09 10:53:57,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:53:57,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/sv-benchmarks/c/memsafety/test-0521.i [2021-11-09 10:53:58,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/c40258454/9abc2020ac064354929b93ef4a6b4273/FLAG270bbb680 [2021-11-09 10:53:58,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/data/c40258454/9abc2020ac064354929b93ef4a6b4273 [2021-11-09 10:53:58,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:53:58,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:53:58,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:53:58,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:53:58,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:53:58,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:58,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c17080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58, skipping insertion in model container [2021-11-09 10:53:58,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:58,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:53:58,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:53:58,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:53:58,773 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:53:58,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:53:58,972 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:53:58,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58 WrapperNode [2021-11-09 10:53:58,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:53:58,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:53:58,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:53:58,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:53:58,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:58,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:53:59,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:53:59,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:53:59,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:53:59,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (1/1) ... [2021-11-09 10:53:59,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:53:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:59,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:53:59,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:53:59,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:53:59,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:53:59,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:53:59,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:53:59,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:53:59,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:53:59,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:53:59,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:53:59,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:53:59,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:53:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:53:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:53:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:53:59,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:53:59,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:53:59,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:53:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:53:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:53:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:53:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:53:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:53:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:53:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:53:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:53:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:53:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:53:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:53:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:53:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:53:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:53:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:53:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:53:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:53:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:53:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:53:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:53:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:53:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:53:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:53:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:53:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:53:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:53:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:53:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:53:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:53:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:53:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:53:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:53:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:53:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:53:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:53:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:53:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:53:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:53:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:53:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:53:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:53:59,323 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:53:59,323 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:53:59,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:53:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:53:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:53:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:53:59,325 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:53:59,325 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:53:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:53:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:53:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:53:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:53:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:53:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:53:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:53:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:53:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:53:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:53:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:53:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:53:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:53:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:53:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:53:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:53:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:53:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:53:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:53:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:53:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:53:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:53:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:53:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:53:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:53:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:53:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:53:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:53:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:53:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:53:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:53:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:53:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:53:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:53:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:53:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:53:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:53:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:53:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:53:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:53:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:53:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:53:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:53:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:53:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:53:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:53:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:53:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:53:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:53:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:53:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:53:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:53:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:53:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:53:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:53:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:53:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:53:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 10:53:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:53:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:53:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:53:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 10:53:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:53:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:53:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 10:53:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:53:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:53:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:53:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:53:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 10:53:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 10:53:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 10:54:01,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:54:01,391 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 10:54:01,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:01 BoogieIcfgContainer [2021-11-09 10:54:01,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:54:01,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:54:01,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:54:01,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:54:01,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:53:58" (1/3) ... [2021-11-09 10:54:01,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fb2e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:01, skipping insertion in model container [2021-11-09 10:54:01,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:58" (2/3) ... [2021-11-09 10:54:01,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fb2e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:01, skipping insertion in model container [2021-11-09 10:54:01,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:01" (3/3) ... [2021-11-09 10:54:01,408 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0521.i [2021-11-09 10:54:01,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:54:01,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 152 error locations. [2021-11-09 10:54:01,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:54:01,504 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 [2021-11-09 10:54:01,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 152 error locations. [2021-11-09 10:54:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 314 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 309 states have internal predecessors, (346), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 10:54:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:54:01,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:01,568 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:01,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1178268032, now seen corresponding path program 1 times [2021-11-09 10:54:01,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:01,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104498614] [2021-11-09 10:54:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:01,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:01,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:01,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:54:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 10:54:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:01,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:01,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:01,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104498614] [2021-11-09 10:54:01,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104498614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:01,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:01,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:54:01,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174875263] [2021-11-09 10:54:01,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:54:01,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:54:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:54:02,035 INFO L87 Difference]: Start difference. First operand has 314 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 309 states have internal predecessors, (346), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:02,080 INFO L93 Difference]: Finished difference Result 314 states and 340 transitions. [2021-11-09 10:54:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:54:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 9 [2021-11-09 10:54:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:02,096 INFO L225 Difference]: With dead ends: 314 [2021-11-09 10:54:02,096 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 10:54:02,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:54:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 10:54:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-11-09 10:54:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 156 states have (on average 2.141025641025641) internal successors, (334), 307 states have internal predecessors, (334), 2 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) [2021-11-09 10:54:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 337 transitions. [2021-11-09 10:54:02,183 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 337 transitions. Word has length 9 [2021-11-09 10:54:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:02,184 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 337 transitions. [2021-11-09 10:54:02,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 337 transitions. [2021-11-09 10:54:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:54:02,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:02,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:02,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:02,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1178296862, now seen corresponding path program 1 times [2021-11-09 10:54:02,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:02,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583519372] [2021-11-09 10:54:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:02,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:02,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:02,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:54:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:54:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:02,703 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 [2021-11-09 10:54:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:02,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:02,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:02,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583519372] [2021-11-09 10:54:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583519372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:02,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:02,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:54:02,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085540231] [2021-11-09 10:54:02,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:54:02,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:54:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:02,758 INFO L87 Difference]: Start difference. First operand 311 states and 337 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:03,558 INFO L93 Difference]: Finished difference Result 295 states and 321 transitions. [2021-11-09 10:54:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 9 [2021-11-09 10:54:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:03,566 INFO L225 Difference]: With dead ends: 295 [2021-11-09 10:54:03,566 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 10:54:03,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 10:54:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-11-09 10:54:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 156 states have (on average 2.0384615384615383) internal successors, (318), 291 states have internal predecessors, (318), 2 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) [2021-11-09 10:54:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 321 transitions. [2021-11-09 10:54:03,596 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 321 transitions. Word has length 9 [2021-11-09 10:54:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:03,596 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 321 transitions. [2021-11-09 10:54:03,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 321 transitions. [2021-11-09 10:54:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:54:03,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:03,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:03,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:03,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1178296861, now seen corresponding path program 1 times [2021-11-09 10:54:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:03,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143955585] [2021-11-09 10:54:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:03,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:03,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 10:54:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:54:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:04,076 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 [2021-11-09 10:54:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:04,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:04,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:04,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143955585] [2021-11-09 10:54:04,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143955585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:04,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:04,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:54:04,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672009691] [2021-11-09 10:54:04,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:54:04,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:54:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:04,193 INFO L87 Difference]: Start difference. First operand 295 states and 321 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:05,480 INFO L93 Difference]: Finished difference Result 279 states and 305 transitions. [2021-11-09 10:54:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 9 [2021-11-09 10:54:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:05,484 INFO L225 Difference]: With dead ends: 279 [2021-11-09 10:54:05,484 INFO L226 Difference]: Without dead ends: 279 [2021-11-09 10:54:05,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-09 10:54:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-11-09 10:54:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 156 states have (on average 1.935897435897436) internal successors, (302), 275 states have internal predecessors, (302), 2 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) [2021-11-09 10:54:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 305 transitions. [2021-11-09 10:54:05,501 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 305 transitions. Word has length 9 [2021-11-09 10:54:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:05,502 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 305 transitions. [2021-11-09 10:54:05,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 305 transitions. [2021-11-09 10:54:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:54:05,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:05,503 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:05,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:05,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1178295739, now seen corresponding path program 1 times [2021-11-09 10:54:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:05,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365153588] [2021-11-09 10:54:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:05,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:05,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 10:54:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:54:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:05,885 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 [2021-11-09 10:54:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:05,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:05,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:05,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365153588] [2021-11-09 10:54:05,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365153588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:05,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:05,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:54:05,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570478217] [2021-11-09 10:54:05,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:54:05,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:54:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:05,930 INFO L87 Difference]: Start difference. First operand 279 states and 305 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:06,581 INFO L93 Difference]: Finished difference Result 333 states and 368 transitions. [2021-11-09 10:54:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:06,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 9 [2021-11-09 10:54:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:06,584 INFO L225 Difference]: With dead ends: 333 [2021-11-09 10:54:06,584 INFO L226 Difference]: Without dead ends: 333 [2021-11-09 10:54:06,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-09 10:54:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 277. [2021-11-09 10:54:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 156 states have (on average 1.9230769230769231) internal successors, (300), 273 states have internal predecessors, (300), 2 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) [2021-11-09 10:54:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 303 transitions. [2021-11-09 10:54:06,599 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 303 transitions. Word has length 9 [2021-11-09 10:54:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:06,599 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 303 transitions. [2021-11-09 10:54:06,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 303 transitions. [2021-11-09 10:54:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:54:06,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:06,601 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:06,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:06,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:06,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1178295738, now seen corresponding path program 1 times [2021-11-09 10:54:06,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:06,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463326447] [2021-11-09 10:54:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:06,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:06,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:06,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 10:54:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:54:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:06,998 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 [2021-11-09 10:54:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:07,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:07,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:07,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463326447] [2021-11-09 10:54:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463326447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:07,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:07,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:54:07,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955612834] [2021-11-09 10:54:07,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:54:07,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:54:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:07,135 INFO L87 Difference]: Start difference. First operand 277 states and 303 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:08,684 INFO L93 Difference]: Finished difference Result 465 states and 513 transitions. [2021-11-09 10:54:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 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 9 [2021-11-09 10:54:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:08,688 INFO L225 Difference]: With dead ends: 465 [2021-11-09 10:54:08,689 INFO L226 Difference]: Without dead ends: 465 [2021-11-09 10:54:08,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-09 10:54:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 275. [2021-11-09 10:54:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 156 states have (on average 1.9102564102564104) internal successors, (298), 271 states have internal predecessors, (298), 2 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) [2021-11-09 10:54:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 301 transitions. [2021-11-09 10:54:08,699 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 301 transitions. Word has length 9 [2021-11-09 10:54:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:08,700 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 301 transitions. [2021-11-09 10:54:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 301 transitions. [2021-11-09 10:54:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:54:08,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:08,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:08,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-09 10:54:08,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:08,914 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1528083427, now seen corresponding path program 1 times [2021-11-09 10:54:08,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:08,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945257383] [2021-11-09 10:54:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:08,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:08,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 10:54:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:54:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:09,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:09,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:09,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945257383] [2021-11-09 10:54:09,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945257383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:09,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:09,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:54:09,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616539124] [2021-11-09 10:54:09,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:54:09,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:54:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:09,207 INFO L87 Difference]: Start difference. First operand 275 states and 301 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:09,343 INFO L93 Difference]: Finished difference Result 672 states and 738 transitions. [2021-11-09 10:54:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:54:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 11 [2021-11-09 10:54:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:09,349 INFO L225 Difference]: With dead ends: 672 [2021-11-09 10:54:09,349 INFO L226 Difference]: Without dead ends: 672 [2021-11-09 10:54:09,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:54:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-09 10:54:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 279. [2021-11-09 10:54:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 160 states have (on average 1.89375) internal successors, (303), 275 states have internal predecessors, (303), 2 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) [2021-11-09 10:54:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 306 transitions. [2021-11-09 10:54:09,363 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 306 transitions. Word has length 11 [2021-11-09 10:54:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:09,364 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 306 transitions. [2021-11-09 10:54:09,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 306 transitions. [2021-11-09 10:54:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:54:09,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:09,365 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:09,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:09,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:09,577 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 645675658, now seen corresponding path program 1 times [2021-11-09 10:54:09,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:09,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132982232] [2021-11-09 10:54:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:09,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:09,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:09,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 10:54:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:54:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:09,786 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 [2021-11-09 10:54:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:09,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:09,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132982232] [2021-11-09 10:54:09,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132982232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:09,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:54:09,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958956703] [2021-11-09 10:54:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:54:09,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:54:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:09,851 INFO L87 Difference]: Start difference. First operand 279 states and 306 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:10,565 INFO L93 Difference]: Finished difference Result 328 states and 362 transitions. [2021-11-09 10:54:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 13 [2021-11-09 10:54:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:10,568 INFO L225 Difference]: With dead ends: 328 [2021-11-09 10:54:10,569 INFO L226 Difference]: Without dead ends: 328 [2021-11-09 10:54:10,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-09 10:54:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 277. [2021-11-09 10:54:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 160 states have (on average 1.88125) internal successors, (301), 273 states have internal predecessors, (301), 2 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) [2021-11-09 10:54:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 304 transitions. [2021-11-09 10:54:10,579 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 304 transitions. Word has length 13 [2021-11-09 10:54:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:10,579 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 304 transitions. [2021-11-09 10:54:10,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 304 transitions. [2021-11-09 10:54:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:54:10,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:10,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:10,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:10,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:10,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:10,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 645675659, now seen corresponding path program 1 times [2021-11-09 10:54:10,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:10,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616728903] [2021-11-09 10:54:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:10,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:10,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:10,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 10:54:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:54:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:10,983 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 [2021-11-09 10:54:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:11,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:11,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:11,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616728903] [2021-11-09 10:54:11,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616728903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:11,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:11,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:54:11,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623439970] [2021-11-09 10:54:11,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:54:11,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:54:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:11,098 INFO L87 Difference]: Start difference. First operand 277 states and 304 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:12,832 INFO L93 Difference]: Finished difference Result 464 states and 511 transitions. [2021-11-09 10:54:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:54:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 13 [2021-11-09 10:54:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:12,836 INFO L225 Difference]: With dead ends: 464 [2021-11-09 10:54:12,836 INFO L226 Difference]: Without dead ends: 464 [2021-11-09 10:54:12,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-09 10:54:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 275. [2021-11-09 10:54:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 160 states have (on average 1.86875) internal successors, (299), 271 states have internal predecessors, (299), 2 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) [2021-11-09 10:54:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 302 transitions. [2021-11-09 10:54:12,852 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 302 transitions. Word has length 13 [2021-11-09 10:54:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:12,853 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 302 transitions. [2021-11-09 10:54:12,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 302 transitions. [2021-11-09 10:54:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:54:12,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:12,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:12,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:13,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1494158270, now seen corresponding path program 1 times [2021-11-09 10:54:13,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:13,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030003900] [2021-11-09 10:54:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:13,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:13,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:13,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:13,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 10:54:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:54:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-09 10:54:13,393 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 18 treesize of output 10 [2021-11-09 10:54:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:13,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:13,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:13,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030003900] [2021-11-09 10:54:13,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030003900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:13,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:13,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-09 10:54:13,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102991012] [2021-11-09 10:54:13,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:54:13,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:54:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:54:13,529 INFO L87 Difference]: Start difference. First operand 275 states and 302 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:14,100 INFO L93 Difference]: Finished difference Result 660 states and 726 transitions. [2021-11-09 10:54:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:54:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 16 [2021-11-09 10:54:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:14,106 INFO L225 Difference]: With dead ends: 660 [2021-11-09 10:54:14,106 INFO L226 Difference]: Without dead ends: 660 [2021-11-09 10:54:14,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:54:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-09 10:54:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 278. [2021-11-09 10:54:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 163 states have (on average 1.852760736196319) internal successors, (302), 274 states have internal predecessors, (302), 2 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) [2021-11-09 10:54:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 305 transitions. [2021-11-09 10:54:14,118 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 305 transitions. Word has length 16 [2021-11-09 10:54:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:14,119 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 305 transitions. [2021-11-09 10:54:14,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 305 transitions. [2021-11-09 10:54:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:54:14,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:14,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:14,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:14,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:14,333 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1356252692, now seen corresponding path program 1 times [2021-11-09 10:54:14,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:14,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337590020] [2021-11-09 10:54:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:14,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:14,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:14,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 10:54:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:54:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:14,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:14,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:14,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337590020] [2021-11-09 10:54:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337590020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:14,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:14,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-09 10:54:14,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702164304] [2021-11-09 10:54:14,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:54:14,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:54:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:54:14,781 INFO L87 Difference]: Start difference. First operand 278 states and 305 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:14,961 INFO L93 Difference]: Finished difference Result 406 states and 444 transitions. [2021-11-09 10:54:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:54:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 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 18 [2021-11-09 10:54:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:14,964 INFO L225 Difference]: With dead ends: 406 [2021-11-09 10:54:14,964 INFO L226 Difference]: Without dead ends: 406 [2021-11-09 10:54:14,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:54:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-09 10:54:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 342. [2021-11-09 10:54:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 227 states have (on average 1.894273127753304) internal successors, (430), 338 states have internal predecessors, (430), 2 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) [2021-11-09 10:54:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 433 transitions. [2021-11-09 10:54:14,975 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 433 transitions. Word has length 18 [2021-11-09 10:54:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:14,975 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 433 transitions. [2021-11-09 10:54:14,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 433 transitions. [2021-11-09 10:54:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:54:14,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:14,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:14,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-09 10:54:15,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:15,188 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -899099540, now seen corresponding path program 1 times [2021-11-09 10:54:15,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:15,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862953514] [2021-11-09 10:54:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:15,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:15,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:15,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 10:54:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:54:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:15,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:15,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:15,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862953514] [2021-11-09 10:54:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862953514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:15,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:15,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 10:54:15,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676961413] [2021-11-09 10:54:15,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:54:15,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:54:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:15,508 INFO L87 Difference]: Start difference. First operand 342 states and 433 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:15,527 INFO L93 Difference]: Finished difference Result 327 states and 408 transitions. [2021-11-09 10:54:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:15,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 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 19 [2021-11-09 10:54:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:15,530 INFO L225 Difference]: With dead ends: 327 [2021-11-09 10:54:15,531 INFO L226 Difference]: Without dead ends: 327 [2021-11-09 10:54:15,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-09 10:54:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2021-11-09 10:54:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 212 states have (on average 1.9103773584905661) internal successors, (405), 323 states have internal predecessors, (405), 2 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) [2021-11-09 10:54:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 408 transitions. [2021-11-09 10:54:15,541 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 408 transitions. Word has length 19 [2021-11-09 10:54:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:15,542 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 408 transitions. [2021-11-09 10:54:15,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 408 transitions. [2021-11-09 10:54:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:54:15,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:15,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:15,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:15,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:15,756 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr93REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1983943896, now seen corresponding path program 1 times [2021-11-09 10:54:15,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:15,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323381463] [2021-11-09 10:54:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:15,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:15,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 10:54:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:54:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:15,983 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 [2021-11-09 10:54:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:15,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:16,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:16,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323381463] [2021-11-09 10:54:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323381463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:16,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:16,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:54:16,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030067232] [2021-11-09 10:54:16,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:54:16,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:54:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:16,031 INFO L87 Difference]: Start difference. First operand 327 states and 408 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:16,478 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2021-11-09 10:54:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 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 20 [2021-11-09 10:54:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:16,481 INFO L225 Difference]: With dead ends: 311 [2021-11-09 10:54:16,481 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 10:54:16,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:54:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 10:54:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-11-09 10:54:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 212 states have (on average 1.759433962264151) internal successors, (373), 307 states have internal predecessors, (373), 2 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) [2021-11-09 10:54:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 376 transitions. [2021-11-09 10:54:16,490 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 376 transitions. Word has length 20 [2021-11-09 10:54:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:16,490 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 376 transitions. [2021-11-09 10:54:16,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 376 transitions. [2021-11-09 10:54:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:54:16,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:16,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:16,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:16,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:16,709 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr94REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1983943897, now seen corresponding path program 1 times [2021-11-09 10:54:16,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:16,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502920300] [2021-11-09 10:54:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:16,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:16,715 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 10:54:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:54:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:17,022 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 [2021-11-09 10:54:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:17,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:17,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:17,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502920300] [2021-11-09 10:54:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502920300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:17,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:17,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:54:17,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337240425] [2021-11-09 10:54:17,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:54:17,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:54:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:17,128 INFO L87 Difference]: Start difference. First operand 311 states and 376 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:18,125 INFO L93 Difference]: Finished difference Result 295 states and 344 transitions. [2021-11-09 10:54:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:54:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 20 [2021-11-09 10:54:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:18,127 INFO L225 Difference]: With dead ends: 295 [2021-11-09 10:54:18,127 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 10:54:18,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:54:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 10:54:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-11-09 10:54:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 212 states have (on average 1.6084905660377358) internal successors, (341), 291 states have internal predecessors, (341), 2 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) [2021-11-09 10:54:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 344 transitions. [2021-11-09 10:54:18,136 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 344 transitions. Word has length 20 [2021-11-09 10:54:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:18,136 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 344 transitions. [2021-11-09 10:54:18,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 344 transitions. [2021-11-09 10:54:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:54:18,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:18,138 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:18,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-09 10:54:18,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:18,349 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:18,350 INFO L85 PathProgramCache]: Analyzing trace with hash 824848451, now seen corresponding path program 1 times [2021-11-09 10:54:18,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:18,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006065353] [2021-11-09 10:54:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:18,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:18,353 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:18,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 10:54:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:54:18,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:18,613 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 [2021-11-09 10:54:18,660 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-09 10:54:18,660 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 17 treesize of output 22 [2021-11-09 10:54:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:18,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006065353] [2021-11-09 10:54:18,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006065353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:18,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:18,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 10:54:18,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306406802] [2021-11-09 10:54:18,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:54:18,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:54:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:54:18,816 INFO L87 Difference]: Start difference. First operand 295 states and 344 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:20,014 INFO L93 Difference]: Finished difference Result 317 states and 367 transitions. [2021-11-09 10:54:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:54:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 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 20 [2021-11-09 10:54:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:20,017 INFO L225 Difference]: With dead ends: 317 [2021-11-09 10:54:20,017 INFO L226 Difference]: Without dead ends: 317 [2021-11-09 10:54:20,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-09 10:54:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 297. [2021-11-09 10:54:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 216 states have (on average 1.6018518518518519) internal successors, (346), 293 states have internal predecessors, (346), 2 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) [2021-11-09 10:54:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 349 transitions. [2021-11-09 10:54:20,030 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 349 transitions. Word has length 20 [2021-11-09 10:54:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 349 transitions. [2021-11-09 10:54:20,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 349 transitions. [2021-11-09 10:54:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:54:20,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:20,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:20,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:20,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:20,246 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash 824848452, now seen corresponding path program 1 times [2021-11-09 10:54:20,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:20,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083723823] [2021-11-09 10:54:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:20,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:20,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 10:54:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:54:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:20,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:54:20,617 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:54:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:54:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:20,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:21,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:21,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083723823] [2021-11-09 10:54:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083723823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:21,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:21,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 10:54:21,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474351205] [2021-11-09 10:54:21,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:54:21,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:54:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:21,108 INFO L87 Difference]: Start difference. First operand 297 states and 349 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:24,014 INFO L93 Difference]: Finished difference Result 414 states and 482 transitions. [2021-11-09 10:54:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:54:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 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 20 [2021-11-09 10:54:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:24,017 INFO L225 Difference]: With dead ends: 414 [2021-11-09 10:54:24,018 INFO L226 Difference]: Without dead ends: 414 [2021-11-09 10:54:24,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:54:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-09 10:54:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 296. [2021-11-09 10:54:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 216 states have (on average 1.5972222222222223) internal successors, (345), 292 states have internal predecessors, (345), 2 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) [2021-11-09 10:54:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-11-09 10:54:24,028 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 20 [2021-11-09 10:54:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:24,028 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-11-09 10:54:24,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-11-09 10:54:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:54:24,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:24,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:24,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:24,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:24,242 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr95REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -395384999, now seen corresponding path program 1 times [2021-11-09 10:54:24,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:24,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994930006] [2021-11-09 10:54:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:24,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:24,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:24,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 10:54:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:54:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:24,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:24,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994930006] [2021-11-09 10:54:24,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994930006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:24,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:24,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-09 10:54:24,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091707262] [2021-11-09 10:54:24,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:54:24,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:54:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:54:24,807 INFO L87 Difference]: Start difference. First operand 296 states and 348 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:25,008 INFO L93 Difference]: Finished difference Result 396 states and 443 transitions. [2021-11-09 10:54:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:54:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 22 [2021-11-09 10:54:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:25,012 INFO L225 Difference]: With dead ends: 396 [2021-11-09 10:54:25,013 INFO L226 Difference]: Without dead ends: 396 [2021-11-09 10:54:25,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-09 10:54:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 293. [2021-11-09 10:54:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 213 states have (on average 1.591549295774648) internal successors, (339), 289 states have internal predecessors, (339), 2 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) [2021-11-09 10:54:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 342 transitions. [2021-11-09 10:54:25,025 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 342 transitions. Word has length 22 [2021-11-09 10:54:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:25,026 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 342 transitions. [2021-11-09 10:54:25,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 342 transitions. [2021-11-09 10:54:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:54:25,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:25,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:25,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:25,244 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1155025758, now seen corresponding path program 1 times [2021-11-09 10:54:25,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:25,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418687509] [2021-11-09 10:54:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:25,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:25,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:25,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 10:54:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:54:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:25,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:25,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418687509] [2021-11-09 10:54:25,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418687509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:25,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:25,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-09 10:54:25,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534576574] [2021-11-09 10:54:25,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:54:25,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:54:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:54:25,778 INFO L87 Difference]: Start difference. First operand 293 states and 342 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:25,952 INFO L93 Difference]: Finished difference Result 316 states and 351 transitions. [2021-11-09 10:54:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:54:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 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 25 [2021-11-09 10:54:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:25,955 INFO L225 Difference]: With dead ends: 316 [2021-11-09 10:54:25,955 INFO L226 Difference]: Without dead ends: 316 [2021-11-09 10:54:25,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-09 10:54:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 293. [2021-11-09 10:54:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 213 states have (on average 1.5868544600938967) internal successors, (338), 289 states have internal predecessors, (338), 2 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) [2021-11-09 10:54:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 341 transitions. [2021-11-09 10:54:25,964 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 341 transitions. Word has length 25 [2021-11-09 10:54:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:25,965 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 341 transitions. [2021-11-09 10:54:25,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 341 transitions. [2021-11-09 10:54:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 10:54:25,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:25,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:25,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:26,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:26,180 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr103REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -202289384, now seen corresponding path program 1 times [2021-11-09 10:54:26,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:26,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328997153] [2021-11-09 10:54:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:26,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:26,182 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:26,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 10:54:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:54:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:26,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:26,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:26,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-09 10:54:26,707 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 18 treesize of output 10 [2021-11-09 10:54:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:26,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:26,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328997153] [2021-11-09 10:54:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328997153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:26,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:26,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-09 10:54:26,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903190456] [2021-11-09 10:54:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:54:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:54:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:54:26,900 INFO L87 Difference]: Start difference. First operand 293 states and 341 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:27,615 INFO L93 Difference]: Finished difference Result 392 states and 438 transitions. [2021-11-09 10:54:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:54:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 1 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 27 [2021-11-09 10:54:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:27,619 INFO L225 Difference]: With dead ends: 392 [2021-11-09 10:54:27,619 INFO L226 Difference]: Without dead ends: 392 [2021-11-09 10:54:27,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:54:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-09 10:54:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 279. [2021-11-09 10:54:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 199 states have (on average 1.5829145728643217) internal successors, (315), 275 states have internal predecessors, (315), 2 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) [2021-11-09 10:54:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2021-11-09 10:54:27,627 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 27 [2021-11-09 10:54:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:27,627 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2021-11-09 10:54:27,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2021-11-09 10:54:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:54:27,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:27,629 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:27,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:27,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:27,841 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1667056489, now seen corresponding path program 1 times [2021-11-09 10:54:27,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:27,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112775987] [2021-11-09 10:54:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:27,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:27,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 10:54:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:54:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:28,311 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 [2021-11-09 10:54:28,372 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-09 10:54:28,372 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 16 treesize of output 21 [2021-11-09 10:54:28,452 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 28 treesize of output 24 [2021-11-09 10:54:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:28,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-09 10:54:28,645 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-09 10:54:28,645 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 49 [2021-11-09 10:54:28,750 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 10:54:28,750 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 33 treesize of output 36 [2021-11-09 10:54:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:29,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:54:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2021-11-09 10:54:29,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:54:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 59 [2021-11-09 10:54:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:29,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:31,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:54:31,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112775987] [2021-11-09 10:54:31,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112775987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:31,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:31,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-11-09 10:54:31,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563416240] [2021-11-09 10:54:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:54:31,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:54:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:54:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:54:31,331 INFO L87 Difference]: Start difference. First operand 279 states and 318 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:38,580 INFO L93 Difference]: Finished difference Result 320 states and 365 transitions. [2021-11-09 10:54:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:54:38,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 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 28 [2021-11-09 10:54:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:38,583 INFO L225 Difference]: With dead ends: 320 [2021-11-09 10:54:38,583 INFO L226 Difference]: Without dead ends: 320 [2021-11-09 10:54:38,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:54:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-09 10:54:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 278. [2021-11-09 10:54:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 199 states have (on average 1.5778894472361809) internal successors, (314), 274 states have internal predecessors, (314), 2 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) [2021-11-09 10:54:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 317 transitions. [2021-11-09 10:54:38,591 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 317 transitions. Word has length 28 [2021-11-09 10:54:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:38,591 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 317 transitions. [2021-11-09 10:54:38,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 317 transitions. [2021-11-09 10:54:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:54:38,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:38,592 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:38,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-09 10:54:38,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:54:38,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 147 more)] === [2021-11-09 10:54:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1667056490, now seen corresponding path program 1 times [2021-11-09 10:54:38,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:54:38,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836906895] [2021-11-09 10:54:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:38,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:54:38,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:54:38,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:54:38,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-09 10:54:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:54:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:39,218 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 [2021-11-09 10:54:39,261 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 [2021-11-09 10:54:39,276 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:54:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:54:39,322 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 17 treesize of output 13 [2021-11-09 10:54:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:39,387 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:54:39,387 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 [2021-11-09 10:54:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:39,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:54:39,527 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-09 10:54:39,527 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 [2021-11-09 10:54:39,551 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:54:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-09 10:54:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:54:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:54:39,890 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:54:39,890 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 77 [2021-11-09 10:54:39,931 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 10:54:39,931 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 79 [2021-11-09 10:54:40,223 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 10:54:40,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 64 [2021-11-09 10:54:40,233 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:54:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 32 [2021-11-09 10:54:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:40,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:54:43,102 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_~#iter~0.base| (store (select |c_#memory_$Pointer$.offset| |c_main_~#iter~0.base|) |main_~#iter~0.offset| c_main_~list~0.offset)) c_main_~list~0.base) c_main_~list~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_~#iter~0.base| (store (select |c_#memory_$Pointer$.base| |c_main_~#iter~0.base|) |main_~#iter~0.offset| c_main_~list~0.base)) c_main_~list~0.base) c_main_~list~0.offset)))) (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_main_~#iter~0.base| (store (select |c_#memory_$Pointer$.offset| |c_main_~#iter~0.base|) |main_~#iter~0.offset| c_main_~list~0.offset)) c_main_~list~0.base) c_main_~list~0.offset))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-11-09 10:54:45,176 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_main_~#iter~0.base_67| (_ BitVec 32))) (or (and (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_67| (store (select |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_67|) |main_~#iter~0.offset| c_main_~data~0.offset)) c_main_~data~0.base) c_main_~data~0.offset)) (select (store |c_#length| |v_main_~#iter~0.base_67| (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| |v_main_~#iter~0.base_67| (store (select |c_#memory_$Pointer$.base| |v_main_~#iter~0.base_67|) |main_~#iter~0.offset| c_main_~data~0.base)) c_main_~data~0.base) c_main_~data~0.offset)))) (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_67| (store (select |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_67|) |main_~#iter~0.offset| c_main_~data~0.offset)) c_main_~data~0.base) c_main_~data~0.offset))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_main_~#iter~0.base_67|)))))) is different from false [2021-11-09 10:55:19,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:55:19,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836906895] [2021-11-09 10:55:19,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-09 10:55:19,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1463454404] [2021-11-09 10:55:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:55:19,225 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-09 10:55:19,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/cvc4 [2021-11-09 10:55:19,230 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-09 10:55:19,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46cd9db0-9efd-427d-be98-d16d92c4a612/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-09 10:55:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:55:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:55:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:55:19,855 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 [2021-11-09 10:55:19,861 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 [2021-11-09 10:55:20,354 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-09 10:55:20,354 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 26 treesize of output 33 [2021-11-09 10:55:20,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:55:20,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:55:20,708 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 41 treesize of output 37 [2021-11-09 10:55:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 52 [2021-11-09 10:55:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:55:21,383 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 10:55:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 56 [2021-11-09 10:55:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:55:21,719 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-09 10:55:21,720 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 37 treesize of output 36 [2021-11-09 10:55:21,836 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:55:21,837 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 19 treesize of output 18 [2021-11-09 10:55:22,820 INFO L354 Elim1Store]: treesize reduction 132, result has 14.3 percent of original size [2021-11-09 10:55:22,821 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 128 treesize of output 104 [2021-11-09 10:55:22,941 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-09 10:55:22,941 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 122 treesize of output 114 [2021-11-09 10:55:24,148 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 10:55:24,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 86 [2021-11-09 10:55:24,171 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:55:24,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 53 [2021-11-09 10:55:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:55:27,115 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_main_~#iter~0.base_68| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_main_~#iter~0.base_68|)) (and (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_68| (store (select |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_68|) |main_~#iter~0.offset| c_main_~data~0.offset)) c_main_~data~0.base) c_main_~data~0.offset) (_ bv8 32)) (select (store |c_#length| |v_main_~#iter~0.base_68| (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| |v_main_~#iter~0.base_68| (store (select |c_#memory_$Pointer$.base| |v_main_~#iter~0.base_68|) |main_~#iter~0.offset| c_main_~data~0.base)) c_main_~data~0.base) c_main_~data~0.offset)))) (forall ((|main_~#iter~0.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_68| (store (select |c_#memory_$Pointer$.offset| |v_main_~#iter~0.base_68|) |main_~#iter~0.offset| c_main_~data~0.offset)) c_main_~data~0.base) c_main_~data~0.offset))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd .cse0 (_ bv8 32)))))) (not (= (_ bv0 1) (select |c_#valid| |v_main_~#iter~0.base_68|))))) is different from false [2021-11-09 10:56:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:56:36,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1463454404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:56:36,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:56:36,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 12] imperfect sequences [] total 22 [2021-11-09 10:56:36,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608842044] [2021-11-09 10:56:36,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:56:36,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:56:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:56:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=910, Unknown=43, NotChecked=192, Total=1260 [2021-11-09 10:56:36,372 INFO L87 Difference]: Start difference. First operand 278 states and 317 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:57:22,404 WARN L207 SmtUtils]: Spent 33.33 s on a formula simplification. DAG size of input: 115 DAG size of output: 86