./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD --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 b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:17:51,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:17:51,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:17:52,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:17:52,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:17:52,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:17:52,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:17:52,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:17:52,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:17:52,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:17:52,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:17:52,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:17:52,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:17:52,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:17:52,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:17:52,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:17:52,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:17:52,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:17:52,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:17:52,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:17:52,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:17:52,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:17:52,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:17:52,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:17:52,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:17:52,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:17:52,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:17:52,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:17:52,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:17:52,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:17:52,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:17:52,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:17:52,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:17:52,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:17:52,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:17:52,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:17:52,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:17:52,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:17:52,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:17:52,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:17:52,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:17:52,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:17:52,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:17:52,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:17:52,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:17:52,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:17:52,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:17:52,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:17:52,124 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:17:52,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:17:52,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:17:52,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:17:52,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:17:52,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:17:52,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:17:52,126 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:17:52,126 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:17:52,127 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:17:52,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:17:52,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:17:52,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:17:52,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:17:52,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:17:52,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:17:52,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:17:52,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:17:52,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:17:52,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:17:52,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:17:52,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:17:52,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:17:52,132 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_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b [2021-10-28 23:17:52,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:17:52,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:17:52,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:17:52,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:17:52,505 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:17:52,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-10-28 23:17:52,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/data/3834a3e58/6de8f16d0eec414394088c974e3a26ea/FLAG8ba5fc450 [2021-10-28 23:17:53,111 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:17:53,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-10-28 23:17:53,137 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/data/3834a3e58/6de8f16d0eec414394088c974e3a26ea/FLAG8ba5fc450 [2021-10-28 23:17:53,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/data/3834a3e58/6de8f16d0eec414394088c974e3a26ea [2021-10-28 23:17:53,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:17:53,428 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:17:53,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:17:53,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:17:53,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:17:53,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:53,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56382a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53, skipping insertion in model container [2021-10-28 23:17:53,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:53,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:17:53,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:17:53,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:17:53,871 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:17:53,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:17:53,967 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:17:53,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53 WrapperNode [2021-10-28 23:17:53,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:17:53,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:17:53,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:17:53,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:17:53,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:53,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:17:54,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:17:54,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:17:54,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:17:54,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (1/1) ... [2021-10-28 23:17:54,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:17:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:17:54,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:17:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:17:54,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:17:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:17:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:17:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:17:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:17:54,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:17:54,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:17:54,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2021-10-28 23:17:54,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:17:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:17:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:17:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:17:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:17:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:17:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:17:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:17:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:17:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:17:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:17:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:17:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:17:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:17:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:17:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:17:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:17:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:17:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:17:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:17:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:17:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:17:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:17:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:17:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:17:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:17:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:17:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:17:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:17:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:17:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:17:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:17:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:17:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:17:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:17:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:17:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:17:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:17:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:17:54,167 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:17:54,167 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:17:54,167 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:17:54,168 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:17:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:17:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:17:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:17:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:17:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:17:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:17:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:17:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 23:17:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2021-10-28 23:17:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:17:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:17:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:17:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:17:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:17:54,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:17:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:17:54,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:17:54,731 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:17:54,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:17:54 BoogieIcfgContainer [2021-10-28 23:17:54,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:17:54,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:17:54,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:17:54,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:17:54,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:17:53" (1/3) ... [2021-10-28 23:17:54,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112f4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:17:54, skipping insertion in model container [2021-10-28 23:17:54,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:17:53" (2/3) ... [2021-10-28 23:17:54,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112f4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:17:54, skipping insertion in model container [2021-10-28 23:17:54,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:17:54" (3/3) ... [2021-10-28 23:17:54,745 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-10-28 23:17:54,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:17:54,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-28 23:17:54,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:17:54,797 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 [2021-10-28 23:17:54,798 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-28 23:17:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:17:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:17:54,819 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:54,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:54,820 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2021-10-28 23:17:54,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:54,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76505630] [2021-10-28 23:17:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:54,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:55,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76505630] [2021-10-28 23:17:55,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76505630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:55,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:55,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:17:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716402009] [2021-10-28 23:17:55,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:17:55,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:17:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:17:55,035 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:55,115 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-28 23:17:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:17:55,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 11 [2021-10-28 23:17:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:55,125 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:17:55,125 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:17:55,126 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 [2021-10-28 23:17:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:17:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-28 23:17:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-10-28 23:17:55,161 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-10-28 23:17:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:55,162 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-10-28 23:17:55,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-10-28 23:17:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:17:55,163 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:55,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:55,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:17:55,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2021-10-28 23:17:55,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:55,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661046557] [2021-10-28 23:17:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:55,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:55,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:55,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661046557] [2021-10-28 23:17:55,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661046557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:55,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:55,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:17:55,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697752280] [2021-10-28 23:17:55,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:17:55,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:17:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:17:55,260 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:55,356 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-10-28 23:17:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:17:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-10-28 23:17:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:55,360 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:17:55,360 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:17:55,361 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 [2021-10-28 23:17:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:17:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 23:17:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-28 23:17:55,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-10-28 23:17:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:55,370 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-28 23:17:55,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-28 23:17:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:17:55,371 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:55,371 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:55,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:17:55,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr3REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2021-10-28 23:17:55,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:55,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716089381] [2021-10-28 23:17:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:55,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:55,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:55,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716089381] [2021-10-28 23:17:55,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716089381] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:55,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:17:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467932392] [2021-10-28 23:17:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:17:55,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:17:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:17:55,482 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:55,583 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-10-28 23:17:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:17:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-10-28 23:17:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:55,585 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:17:55,585 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 23:17:55,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:17:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 23:17:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-28 23:17:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-28 23:17:55,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2021-10-28 23:17:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:55,601 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-28 23:17:55,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-28 23:17:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:17:55,602 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:55,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:55,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:17:55,603 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2021-10-28 23:17:55,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:55,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213473429] [2021-10-28 23:17:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:55,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:55,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:55,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213473429] [2021-10-28 23:17:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213473429] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:55,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:17:55,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396499705] [2021-10-28 23:17:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:17:55,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:17:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:17:55,709 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:55,789 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-10-28 23:17:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:17:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-10-28 23:17:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:55,793 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:17:55,793 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 23:17:55,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:17:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 23:17:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-10-28 23:17:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-28 23:17:55,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2021-10-28 23:17:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:55,819 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-28 23:17:55,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:17:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-28 23:17:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:17:55,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:55,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:55,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:17:55,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:55,823 INFO L85 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2021-10-28 23:17:55,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:55,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200667671] [2021-10-28 23:17:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:55,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:55,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:55,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200667671] [2021-10-28 23:17:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200667671] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:55,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:55,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:17:55,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385686934] [2021-10-28 23:17:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:17:55,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:17:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:17:55,969 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-28 23:17:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:56,052 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-28 23:17:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:17:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 11 [2021-10-28 23:17:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:56,055 INFO L225 Difference]: With dead ends: 43 [2021-10-28 23:17:56,055 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 23:17:56,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:17:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 23:17:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-10-28 23:17:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-10-28 23:17:56,063 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-10-28 23:17:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:56,063 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-10-28 23:17:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-28 23:17:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-10-28 23:17:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:17:56,065 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:56,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:56,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:17:56,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrnlenErr0REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2021-10-28 23:17:56,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:56,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616228708] [2021-10-28 23:17:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:56,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:56,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:56,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616228708] [2021-10-28 23:17:56,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616228708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:56,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:56,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:17:56,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613258719] [2021-10-28 23:17:56,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:17:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:17:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:17:56,170 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:56,299 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-28 23:17:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:17:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 23:17:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:56,300 INFO L225 Difference]: With dead ends: 35 [2021-10-28 23:17:56,300 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 23:17:56,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:17:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 23:17:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-28 23:17:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-28 23:17:56,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2021-10-28 23:17:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:56,314 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-28 23:17:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-28 23:17:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:17:56,315 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:56,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:17:56,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2021-10-28 23:17:56,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:56,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121400264] [2021-10-28 23:17:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:56,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:56,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:56,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121400264] [2021-10-28 23:17:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121400264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:56,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:56,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:17:56,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199973902] [2021-10-28 23:17:56,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:17:56,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:17:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:17:56,431 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:56,605 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-10-28 23:17:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:17:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 23:17:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:56,612 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:17:56,612 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:17:56,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:17:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:17:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-10-28 23:17:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-10-28 23:17:56,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2021-10-28 23:17:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:56,620 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-10-28 23:17:56,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-10-28 23:17:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:17:56,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:56,621 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:56,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:17:56,622 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2021-10-28 23:17:56,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:56,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319969416] [2021-10-28 23:17:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:56,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:56,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:56,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319969416] [2021-10-28 23:17:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319969416] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:17:56,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409628260] [2021-10-28 23:17:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:56,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:17:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:17:56,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:17:56,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:17:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:17:56,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:17:56,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:17:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409628260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:17:57,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:17:57,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 23:17:57,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914371871] [2021-10-28 23:17:57,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:17:57,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:17:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:17:57,119 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 23:17:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:57,233 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-28 23:17:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:17:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 15 [2021-10-28 23:17:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:57,236 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:17:57,236 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:17:57,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:17:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:17:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-10-28 23:17:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-28 23:17:57,251 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-10-28 23:17:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:57,251 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-28 23:17:57,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-28 23:17:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-28 23:17:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:17:57,252 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:57,252 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:57,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:17:57,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:17:57,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2021-10-28 23:17:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:57,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953422293] [2021-10-28 23:17:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:57,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:57,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:57,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953422293] [2021-10-28 23:17:57,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953422293] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:57,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:57,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:17:57,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905210774] [2021-10-28 23:17:57,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:17:57,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:17:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:17:57,490 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-28 23:17:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:57,538 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-10-28 23:17:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:17:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2021-10-28 23:17:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:57,540 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:17:57,540 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:17:57,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:17:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:17:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:17:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-10-28 23:17:57,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-10-28 23:17:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:57,544 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-10-28 23:17:57,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-28 23:17:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-10-28 23:17:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:17:57,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:57,547 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] [2021-10-28 23:17:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:17:57,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2021-10-28 23:17:57,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:57,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870000861] [2021-10-28 23:17:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:57,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 23:17:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:57,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:57,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870000861] [2021-10-28 23:17:57,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870000861] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:57,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:17:57,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332267526] [2021-10-28 23:17:57,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:17:57,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:17:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:17:57,657 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:57,804 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-28 23:17:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:17:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-10-28 23:17:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:57,807 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:17:57,807 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:17:57,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:17:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:17:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-28 23:17:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-28 23:17:57,817 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-10-28 23:17:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-28 23:17:57,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-28 23:17:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:17:57,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:57,823 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:57,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:17:57,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2021-10-28 23:17:57,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:57,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88865178] [2021-10-28 23:17:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:57,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:57,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:57,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88865178] [2021-10-28 23:17:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88865178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:17:57,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178825889] [2021-10-28 23:17:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:57,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:17:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:17:57,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:17:57,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:17:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:58,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:17:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:17:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178825889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:17:58,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:17:58,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-10-28 23:17:58,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803041246] [2021-10-28 23:17:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:17:58,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:17:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:17:58,263 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:58,452 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-28 23:17:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:17:58,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 23:17:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:58,453 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:17:58,454 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:17:58,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:17:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:17:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-10-28 23:17:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:17:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-28 23:17:58,458 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 22 [2021-10-28 23:17:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:58,458 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-28 23:17:58,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-28 23:17:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:17:58,459 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:58,460 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:17:58,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:17:58,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1187883691, now seen corresponding path program 1 times [2021-10-28 23:17:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:58,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994400419] [2021-10-28 23:17:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:58,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:58,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:58,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:58,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994400419] [2021-10-28 23:17:58,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994400419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:58,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:58,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:17:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897656953] [2021-10-28 23:17:58,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:17:58,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:17:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:17:58,828 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:59,023 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2021-10-28 23:17:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:17:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 23:17:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:59,025 INFO L225 Difference]: With dead ends: 83 [2021-10-28 23:17:59,025 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 23:17:59,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:17:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 23:17:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-10-28 23:17:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:17:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-10-28 23:17:59,030 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 22 [2021-10-28 23:17:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:59,030 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-10-28 23:17:59,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-10-28 23:17:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:17:59,032 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:59,032 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:59,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:17:59,032 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash 166815337, now seen corresponding path program 1 times [2021-10-28 23:17:59,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:59,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548559436] [2021-10-28 23:17:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:59,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:59,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:59,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548559436] [2021-10-28 23:17:59,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548559436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:59,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:59,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:17:59,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767452864] [2021-10-28 23:17:59,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:17:59,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:17:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:17:59,177 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:59,415 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2021-10-28 23:17:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:17:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 23:17:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:59,417 INFO L225 Difference]: With dead ends: 100 [2021-10-28 23:17:59,417 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 23:17:59,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:17:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 23:17:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2021-10-28 23:17:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:17:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-10-28 23:17:59,422 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 22 [2021-10-28 23:17:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-10-28 23:17:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-10-28 23:17:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:17:59,423 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:59,423 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] [2021-10-28 23:17:59,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:17:59,423 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2021-10-28 23:17:59,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:59,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498750957] [2021-10-28 23:17:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:59,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 23:17:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:59,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:59,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498750957] [2021-10-28 23:17:59,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498750957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:17:59,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:17:59,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:17:59,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283613014] [2021-10-28 23:17:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:17:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:17:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:17:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:17:59,483 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:17:59,527 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-10-28 23:17:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:17:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-10-28 23:17:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:17:59,528 INFO L225 Difference]: With dead ends: 68 [2021-10-28 23:17:59,529 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:17:59,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:17:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:17:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:17:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:17:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 23:17:59,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-10-28 23:17:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:17:59,531 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 23:17:59,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:17:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 23:17:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:17:59,532 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:17:59,532 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:17:59,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:17:59,532 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:17:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:17:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 869619206, now seen corresponding path program 1 times [2021-10-28 23:17:59,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:17:59,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698525068] [2021-10-28 23:17:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:59,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:17:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:17:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:17:59,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:17:59,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698525068] [2021-10-28 23:17:59,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698525068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:17:59,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190341925] [2021-10-28 23:17:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:17:59,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:17:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:17:59,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:17:59,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:17:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:17:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:17:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:00,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190341925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:00,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:00,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 23:18:00,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453895428] [2021-10-28 23:18:00,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:18:00,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:18:00,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:18:00,033 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:00,214 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-10-28 23:18:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:18:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-28 23:18:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:00,215 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:18:00,216 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 23:18:00,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:18:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 23:18:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-10-28 23:18:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 23:18:00,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-10-28 23:18:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 23:18:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 23:18:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 23:18:00,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:00,219 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:00,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:00,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:18:00,420 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:18:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2038559330, now seen corresponding path program 2 times [2021-10-28 23:18:00,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:00,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255717441] [2021-10-28 23:18:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:00,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:00,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:00,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:00,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255717441] [2021-10-28 23:18:00,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255717441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:00,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691114769] [2021-10-28 23:18:00,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:18:00,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:00,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:00,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:18:00,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:18:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:18:00,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:00,893 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 25 treesize of output 21 [2021-10-28 23:18:01,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:01,535 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 33 treesize of output 33 [2021-10-28 23:18:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691114769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:01,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:01,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-28 23:18:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185972996] [2021-10-28 23:18:01,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:18:01,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:18:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:18:01,767 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:05,714 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-28 23:18:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:18:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-28 23:18:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:05,715 INFO L225 Difference]: With dead ends: 63 [2021-10-28 23:18:05,715 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 23:18:05,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=214, Invalid=1507, Unknown=1, NotChecked=0, Total=1722 [2021-10-28 23:18:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 23:18:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-28 23:18:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-10-28 23:18:05,718 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 32 [2021-10-28 23:18:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:05,719 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-10-28 23:18:05,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-10-28 23:18:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 23:18:05,719 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:05,720 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:05,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:05,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:18:05,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:18:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 3 times [2021-10-28 23:18:05,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:05,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63643531] [2021-10-28 23:18:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:05,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:06,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63643531] [2021-10-28 23:18:06,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63643531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730028837] [2021-10-28 23:18:06,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:18:06,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:06,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:06,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:18:06,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:18:06,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:18:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:06,527 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 21 treesize of output 17 [2021-10-28 23:18:06,815 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 7 [2021-10-28 23:18:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:06,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730028837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:06,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:06,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-10-28 23:18:06,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639100677] [2021-10-28 23:18:06,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:18:06,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:18:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:18:06,840 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:07,413 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 23:18:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:18:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-10-28 23:18:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:07,414 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:18:07,414 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:18:07,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:18:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:18:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-10-28 23:18:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-10-28 23:18:07,417 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-10-28 23:18:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:07,417 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-10-28 23:18:07,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-10-28 23:18:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:18:07,418 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:07,418 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:07,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:07,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:18:07,618 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:18:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash 736937968, now seen corresponding path program 4 times [2021-10-28 23:18:07,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:07,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378197903] [2021-10-28 23:18:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:07,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:07,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378197903] [2021-10-28 23:18:07,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378197903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:07,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824252096] [2021-10-28 23:18:07,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:18:07,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:07,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:07,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:18:08,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:18:08,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:08,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:18:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:08,082 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 [2021-10-28 23:18:08,257 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 16 treesize of output 12 [2021-10-28 23:18:08,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:08,661 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 19 treesize of output 19 [2021-10-28 23:18:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824252096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:08,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:08,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-10-28 23:18:08,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802424361] [2021-10-28 23:18:08,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:18:08,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:08,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:18:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:18:08,913 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 25 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:09,634 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-28 23:18:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:18:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-10-28 23:18:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:09,635 INFO L225 Difference]: With dead ends: 56 [2021-10-28 23:18:09,635 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 23:18:09,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:18:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 23:18:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-10-28 23:18:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-10-28 23:18:09,638 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2021-10-28 23:18:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:09,638 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-10-28 23:18:09,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-10-28 23:18:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:18:09,639 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:09,639 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:09,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:09,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:18:09,852 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:18:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 5 times [2021-10-28 23:18:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097910269] [2021-10-28 23:18:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:10,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:10,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:10,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097910269] [2021-10-28 23:18:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097910269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:10,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350717245] [2021-10-28 23:18:10,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:18:10,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:10,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:10,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:18:10,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 23:18:10,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:18:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:10,561 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 21 treesize of output 17 [2021-10-28 23:18:10,854 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 7 [2021-10-28 23:18:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:10,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350717245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:10,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:10,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-10-28 23:18:10,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487924458] [2021-10-28 23:18:10,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:18:10,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:18:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:18:10,885 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:11,570 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-10-28 23:18:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:18:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-28 23:18:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:11,571 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:18:11,571 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 23:18:11,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:18:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 23:18:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-10-28 23:18:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-28 23:18:11,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2021-10-28 23:18:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:11,575 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-28 23:18:11,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-28 23:18:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 23:18:11,575 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:11,576 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:11,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:11,796 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-10-28 23:18:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -330733851, now seen corresponding path program 6 times [2021-10-28 23:18:11,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:11,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635778037] [2021-10-28 23:18:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:11,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:12,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:12,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:12,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635778037] [2021-10-28 23:18:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635778037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:12,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653468546] [2021-10-28 23:18:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:18:12,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:12,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:12,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:18:12,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:18:12,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:18:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:12,330 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 [2021-10-28 23:18:12,453 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 23 treesize of output 19 [2021-10-28 23:18:12,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:12,863 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 26 treesize of output 26 [2021-10-28 23:18:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-28 23:18:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653468546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:13,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:13,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-10-28 23:18:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187883286] [2021-10-28 23:18:13,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:18:13,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:18:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:18:13,056 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 23 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:13,810 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-10-28 23:18:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:18:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-10-28 23:18:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:13,811 INFO L225 Difference]: With dead ends: 59 [2021-10-28 23:18:13,811 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:18:13,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:18:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:18:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:18:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:18:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:18:13,812 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-10-28 23:18:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:13,813 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:18:13,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:18:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:18:13,813 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:18:13,815 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr0REQUIRES_VIOLATION [2021-10-28 23:18:13,816 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr1REQUIRES_VIOLATION [2021-10-28 23:18:13,816 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:18:13,816 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:18:13,816 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:18:13,817 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:18:13,817 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:18:13,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:14,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:14,026 INFO L731 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:14,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:18:14,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:18:14 BoogieIcfgContainer [2021-10-28 23:18:14,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:18:14,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:18:14,032 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:18:14,033 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:18:14,033 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:17:54" (3/4) ... [2021-10-28 23:18:14,037 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:18:14,042 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:18:14,042 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 23:18:14,042 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2021-10-28 23:18:14,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 23:18:14,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 23:18:14,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 23:18:14,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:18:14,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 23:18:14,046 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-28 23:18:14,047 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 23:18:14,047 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:18:14,047 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:18:14,081 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:18:14,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:18:14,082 INFO L168 Benchmark]: Toolchain (without parser) took 20653.90 ms. Allocated memory was 92.3 MB in the beginning and 151.0 MB in the end (delta: 58.7 MB). Free memory was 51.9 MB in the beginning and 98.0 MB in the end (delta: -46.2 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:18:14,083 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:18:14,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.30 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 51.7 MB in the beginning and 94.7 MB in the end (delta: -43.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:18:14,083 INFO L168 Benchmark]: Boogie Preprocessor took 92.00 ms. Allocated memory is still 125.8 MB. Free memory was 94.7 MB in the beginning and 92.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:18:14,084 INFO L168 Benchmark]: RCFGBuilder took 674.35 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 73.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:18:14,084 INFO L168 Benchmark]: TraceAbstraction took 19293.37 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 73.3 MB in the beginning and 101.9 MB in the end (delta: -28.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:18:14,085 INFO L168 Benchmark]: Witness Printer took 49.03 ms. Allocated memory is still 151.0 MB. Free memory was 101.2 MB in the beginning and 98.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:18:14,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 539.30 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 51.7 MB in the beginning and 94.7 MB in the end (delta: -43.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.00 ms. Allocated memory is still 125.8 MB. Free memory was 94.7 MB in the beginning and 92.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 674.35 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 73.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19293.37 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 73.3 MB in the beginning and 101.9 MB in the end (delta: -28.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 49.03 ms. Allocated memory is still 151.0 MB. Free memory was 101.2 MB in the beginning and 98.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 19.2s, OverallIterations: 20, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 512 SDtfs, 1085 SDslu, 1030 SDs, 0 SdLazy, 4568 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 277 SyntacticMatches, 6 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=13, InterpolantAutomatonStates: 189, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 107 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 777 NumberOfCodeBlocks, 773 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 749 ConstructedInterpolants, 50 QuantifiedInterpolants, 5630 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1051 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 28 InterpolantComputations, 12 PerfectInterpolantSequences, 140/480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:18:14,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d03527-a2fd-4555-8b71-68e9ec43a23e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...