./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-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_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/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_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/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_0740bd04-2957-4c93-b996-2d5a0ffd275b/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 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 23:27:09,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:27:09,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:27:09,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:27:09,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:27:09,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:27:09,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:27:09,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:27:09,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:27:09,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:27:09,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:27:09,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:27:09,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:27:09,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:27:09,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:27:09,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:27:09,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:27:09,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:27:09,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:27:09,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:27:09,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:27:09,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:27:09,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:27:09,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:27:09,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:27:09,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:27:09,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:27:09,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:27:09,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:27:09,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:27:09,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:27:09,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:27:09,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:27:09,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:27:09,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:27:09,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:27:09,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:27:09,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:27:09,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:27:09,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:27:09,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:27:09,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:27:09,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:27:09,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:27:09,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:27:09,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:27:09,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:27:09,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:27:09,163 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:27:09,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:27:09,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:27:09,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:27:09,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:27:09,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:27:09,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:27:09,166 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:27:09,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:27:09,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:27:09,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:27:09,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:27:09,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:27:09,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:27:09,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:27:09,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:27:09,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:27:09,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:27:09,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:27:09,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:27:09,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:27:09,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:27:09,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:27:09,172 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_0740bd04-2957-4c93-b996-2d5a0ffd275b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 [2021-10-28 23:27:09,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:27:09,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:27:09,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:27:09,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:27:09,485 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:27:09,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-10-28 23:27:09,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/data/118b70fab/01e30740b8b44353822d4171c2acb4a2/FLAG1627762fb [2021-10-28 23:27:10,153 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:27:10,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-10-28 23:27:10,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/data/118b70fab/01e30740b8b44353822d4171c2acb4a2/FLAG1627762fb [2021-10-28 23:27:10,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/data/118b70fab/01e30740b8b44353822d4171c2acb4a2 [2021-10-28 23:27:10,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:27:10,443 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:27:10,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:10,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:27:10,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:27:10,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:10,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a4a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10, skipping insertion in model container [2021-10-28 23:27:10,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:10,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:27:10,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:27:10,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:10,898 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:27:10,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:10,979 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:27:10,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10 WrapperNode [2021-10-28 23:27:10,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:10,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:27:10,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:27:10,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:27:10,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:10,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:27:11,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:27:11,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:27:11,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:27:11,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (1/1) ... [2021-10-28 23:27:11,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:27:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:11,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 23:27:11,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 23:27:11,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 23:27:11,117 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2021-10-28 23:27:11,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:27:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:27:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:27:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:27:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:27:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:27:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:27:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:27:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:27:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:27:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:27:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:27:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:27:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:27:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:27:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:27:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:27:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:27:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:27:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:27:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:27:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:27:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:27:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:27:11,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:27:11,703 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 23:27:11,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:11 BoogieIcfgContainer [2021-10-28 23:27:11,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:27:11,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:27:11,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:27:11,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:27:11,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:27:10" (1/3) ... [2021-10-28 23:27:11,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8410c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:27:11, skipping insertion in model container [2021-10-28 23:27:11,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:10" (2/3) ... [2021-10-28 23:27:11,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8410c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:27:11, skipping insertion in model container [2021-10-28 23:27:11,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:11" (3/3) ... [2021-10-28 23:27:11,723 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-10-28 23:27:11,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:27:11,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-28 23:27:11,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:27:11,775 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 23:27:11,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-28 23:27:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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 23:27:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:27:11,797 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:11,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:11,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1980189205, now seen corresponding path program 1 times [2021-10-28 23:27:11,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:11,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435064548] [2021-10-28 23:27:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:11,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:12,168 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 23:27:12,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:12,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435064548] [2021-10-28 23:27:12,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435064548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:12,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:12,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:12,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764291227] [2021-10-28 23:27:12,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:12,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:12,194 INFO L87 Difference]: Start difference. First operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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 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 23:27:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:12,468 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-10-28 23:27:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:12,470 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 23:27:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:12,485 INFO L225 Difference]: With dead ends: 88 [2021-10-28 23:27:12,485 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 23:27:12,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:27:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 23:27:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-10-28 23:27:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 60 states have internal predecessors, (71), 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 23:27:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-28 23:27:12,544 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 11 [2021-10-28 23:27:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:12,546 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-28 23:27:12,546 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 23:27:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-28 23:27:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:27:12,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:12,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:12,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:27:12,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1982036247, now seen corresponding path program 1 times [2021-10-28 23:27:12,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:12,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242361434] [2021-10-28 23:27:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:12,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:12,727 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 23:27:12,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242361434] [2021-10-28 23:27:12,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242361434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:12,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:12,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:12,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600056466] [2021-10-28 23:27:12,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:12,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:12,737 INFO L87 Difference]: Start difference. First operand 66 states and 76 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 23:27:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:12,950 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-10-28 23:27:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:27:12,951 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 23:27:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:12,955 INFO L225 Difference]: With dead ends: 89 [2021-10-28 23:27:12,955 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 23:27:12,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 23:27:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2021-10-28 23:27:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 62 states have internal predecessors, (75), 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 23:27:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-28 23:27:12,974 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 11 [2021-10-28 23:27:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:12,975 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-28 23:27:12,975 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 23:27:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-28 23:27:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:27:12,976 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:12,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:12,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:27:12,977 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1982036246, now seen corresponding path program 1 times [2021-10-28 23:27:12,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:12,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547606756] [2021-10-28 23:27:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:12,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,071 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 23:27:13,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:13,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547606756] [2021-10-28 23:27:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547606756] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:13,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:13,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:27:13,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848459081] [2021-10-28 23:27:13,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:27:13,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:13,076 INFO L87 Difference]: Start difference. First operand 68 states and 80 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 23:27:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:13,207 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-28 23:27:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:13,211 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 23:27:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:13,215 INFO L225 Difference]: With dead ends: 66 [2021-10-28 23:27:13,216 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:27:13,216 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 23:27:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:27:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 23:27:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 60 states have internal predecessors, (72), 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 23:27:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-10-28 23:27:13,231 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 11 [2021-10-28 23:27:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:13,231 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-10-28 23:27:13,232 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 23:27:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-10-28 23:27:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:27:13,232 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:13,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:13,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:27:13,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 291262476, now seen corresponding path program 1 times [2021-10-28 23:27:13,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:13,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059433845] [2021-10-28 23:27:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:13,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,348 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 23:27:13,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:13,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059433845] [2021-10-28 23:27:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059433845] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:13,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:13,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:13,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321276533] [2021-10-28 23:27:13,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:13,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:13,355 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 23:27:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:13,476 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-28 23:27:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:27:13,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-28 23:27:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:13,478 INFO L225 Difference]: With dead ends: 65 [2021-10-28 23:27:13,478 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 23:27:13,478 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 23:27:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 23:27:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 23:27:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 59 states have internal predecessors, (71), 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 23:27:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-10-28 23:27:13,498 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 13 [2021-10-28 23:27:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:13,499 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-10-28 23:27:13,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 23:27:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-10-28 23:27:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:27:13,500 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:13,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:13,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:27:13,502 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 291262528, now seen corresponding path program 1 times [2021-10-28 23:27:13,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:13,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123534852] [2021-10-28 23:27:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:13,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,596 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 23:27:13,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:13,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123534852] [2021-10-28 23:27:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123534852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:13,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703223659] [2021-10-28 23:27:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:13,600 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 23:27:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:13,722 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-10-28 23:27:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-28 23:27:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:13,724 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:27:13,724 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 23:27:13,725 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 23:27:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 23:27:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-10-28 23:27:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 70 states have internal predecessors, (85), 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 23:27:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-10-28 23:27:13,735 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 13 [2021-10-28 23:27:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-10-28 23:27:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 23:27:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-10-28 23:27:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:27:13,737 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:13,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:13,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:27:13,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash 348520830, now seen corresponding path program 1 times [2021-10-28 23:27:13,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:13,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359512182] [2021-10-28 23:27:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:13,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:13,801 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 23:27:13,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:13,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359512182] [2021-10-28 23:27:13,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359512182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:13,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:13,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:27:13,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985229007] [2021-10-28 23:27:13,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:27:13,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:13,804 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (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 23:27:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:13,898 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-10-28 23:27:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (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 13 [2021-10-28 23:27:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:13,899 INFO L225 Difference]: With dead ends: 74 [2021-10-28 23:27:13,899 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 23:27:13,900 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 23:27:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 23:27:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-28 23:27:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.509090909090909) internal successors, (83), 68 states have internal predecessors, (83), 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 23:27:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-10-28 23:27:13,921 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 13 [2021-10-28 23:27:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:13,922 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-10-28 23:27:13,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (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 23:27:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-10-28 23:27:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:27:13,924 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:13,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:13,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:27:13,925 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash 348520831, now seen corresponding path program 1 times [2021-10-28 23:27:13,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:13,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312994514] [2021-10-28 23:27:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:13,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,041 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 23:27:14,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:14,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312994514] [2021-10-28 23:27:14,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312994514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:14,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:14,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:14,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147384059] [2021-10-28 23:27:14,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:27:14,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:27:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:14,052 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 23:27:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:14,219 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-10-28 23:27:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-10-28 23:27:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:14,221 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:27:14,221 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 23:27:14,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:27:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 23:27:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-10-28 23:27:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 70 states have internal predecessors, (86), 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 23:27:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-10-28 23:27:14,232 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 13 [2021-10-28 23:27:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:14,232 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-10-28 23:27:14,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 23:27:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-10-28 23:27:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:27:14,233 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:14,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:14,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:27:14,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash 439202164, now seen corresponding path program 1 times [2021-10-28 23:27:14,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:14,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643594118] [2021-10-28 23:27:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:14,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,319 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 23:27:14,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:14,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643594118] [2021-10-28 23:27:14,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643594118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:14,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:14,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877454702] [2021-10-28 23:27:14,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:14,322 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 23:27:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:14,420 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-10-28 23:27:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:27:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-10-28 23:27:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:14,421 INFO L225 Difference]: With dead ends: 75 [2021-10-28 23:27:14,421 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 23:27:14,422 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 23:27:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 23:27:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 23:27:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 states have internal predecessors, (85), 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 23:27:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-10-28 23:27:14,425 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 14 [2021-10-28 23:27:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:14,425 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-10-28 23:27:14,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 23:27:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-10-28 23:27:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:27:14,427 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:14,427 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:27:14,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1458990554, now seen corresponding path program 1 times [2021-10-28 23:27:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:14,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938833442] [2021-10-28 23:27:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:14,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,502 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 23:27:14,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:14,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938833442] [2021-10-28 23:27:14,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938833442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:14,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710378719] [2021-10-28 23:27:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:14,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:14,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:14,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:27:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:14,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:27:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:14,838 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:27:14,839 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 23:27:14,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 23:27:14,978 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 23:27:14,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710378719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:14,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:14,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 23:27:14,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958619510] [2021-10-28 23:27:14,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:27:14,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:27:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:27:14,981 INFO L87 Difference]: Start difference. First operand 75 states and 90 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 23:27:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:15,207 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-10-28 23:27:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:15,207 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 23:27:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:15,208 INFO L225 Difference]: With dead ends: 95 [2021-10-28 23:27:15,208 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 23:27:15,209 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 23:27:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 23:27:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2021-10-28 23:27:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 64 states have internal predecessors, (77), 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 23:27:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-28 23:27:15,212 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 15 [2021-10-28 23:27:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:15,212 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-28 23:27:15,212 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 23:27:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-28 23:27:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 23:27:15,213 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:15,213 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:15,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:15,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:15,415 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1456928450, now seen corresponding path program 1 times [2021-10-28 23:27:15,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:15,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725758066] [2021-10-28 23:27:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:15,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:15,497 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 23:27:15,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:15,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725758066] [2021-10-28 23:27:15,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725758066] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:15,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179822188] [2021-10-28 23:27:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:15,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:15,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:15,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:27:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:27:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:15,652 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:15,653 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:15,755 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 23:27:15,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179822188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:15,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:15,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 23:27:15,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358262653] [2021-10-28 23:27:15,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:15,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:27:15,757 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:27:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:15,959 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-10-28 23:27:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:27:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-10-28 23:27:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:15,961 INFO L225 Difference]: With dead ends: 78 [2021-10-28 23:27:15,961 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 23:27:15,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 23:27:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-10-28 23:27:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 61 states have internal predecessors, (73), 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 23:27:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-28 23:27:15,964 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-28 23:27:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:15,964 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-28 23:27:15,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:27:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-28 23:27:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:27:15,965 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:15,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:15,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:16,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:27:16,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncmpErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1817523924, now seen corresponding path program 1 times [2021-10-28 23:27:16,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527004373] [2021-10-28 23:27:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,232 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 23:27:16,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:16,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527004373] [2021-10-28 23:27:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527004373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:16,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:16,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:16,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108455901] [2021-10-28 23:27:16,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:27:16,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:27:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:16,234 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23:27:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:16,347 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-10-28 23:27:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 21 [2021-10-28 23:27:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:16,348 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:27:16,348 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:27:16,348 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 23:27:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:27:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 23:27:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 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 23:27:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-10-28 23:27:16,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 21 [2021-10-28 23:27:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:16,351 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-10-28 23:27:16,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23:27:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-10-28 23:27:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:27:16,352 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:16,353 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 23:27:16,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:27:16,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1817523925, now seen corresponding path program 1 times [2021-10-28 23:27:16,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805918618] [2021-10-28 23:27:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,433 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 23:27:16,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:16,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805918618] [2021-10-28 23:27:16,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805918618] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:16,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:16,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:27:16,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112704822] [2021-10-28 23:27:16,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:16,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:27:16,436 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 23:27:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:16,654 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-10-28 23:27:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:27:16,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21 [2021-10-28 23:27:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:16,658 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:27:16,658 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 23:27:16,659 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 23:27:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 23:27:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-10-28 23:27:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.4) internal successors, (84), 67 states have internal predecessors, (84), 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 23:27:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-10-28 23:27:16,662 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 21 [2021-10-28 23:27:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:16,662 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-10-28 23:27:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 23:27:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-10-28 23:27:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:27:16,663 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:16,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:27:16,664 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 509312965, now seen corresponding path program 1 times [2021-10-28 23:27:16,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919613443] [2021-10-28 23:27:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:27:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,726 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 23:27:16,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:16,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919613443] [2021-10-28 23:27:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919613443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:16,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:16,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217882377] [2021-10-28 23:27:16,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:27:16,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:27:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:16,729 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 23:27:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:16,820 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-28 23:27:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 22 [2021-10-28 23:27:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:16,821 INFO L225 Difference]: With dead ends: 72 [2021-10-28 23:27:16,821 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 23:27:16,821 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 23:27:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 23:27:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 23:27:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 60 states have internal predecessors, (74), 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 23:27:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-10-28 23:27:16,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 22 [2021-10-28 23:27:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:16,824 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-10-28 23:27:16,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 23:27:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-10-28 23:27:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:27:16,825 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:16,825 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:16,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:27:16,825 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncmpErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash 508666854, now seen corresponding path program 1 times [2021-10-28 23:27:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090280047] [2021-10-28 23:27:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,870 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 23:27:16,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:16,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090280047] [2021-10-28 23:27:16,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090280047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:16,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:16,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:16,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851827556] [2021-10-28 23:27:16,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:27:16,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:27:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:16,872 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.6) 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, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:27:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:16,960 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-10-28 23:27:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:27:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) 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, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-28 23:27:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:16,962 INFO L225 Difference]: With dead ends: 63 [2021-10-28 23:27:16,962 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 23:27:16,962 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 23:27:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 23:27:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 23:27:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 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 23:27:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-10-28 23:27:16,965 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 22 [2021-10-28 23:27:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:16,965 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-10-28 23:27:16,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) 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, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:27:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-10-28 23:27:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:27:16,966 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:16,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:16,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:27:16,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash 508666855, now seen corresponding path program 1 times [2021-10-28 23:27:16,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947113010] [2021-10-28 23:27:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,041 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 23:27:17,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947113010] [2021-10-28 23:27:17,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947113010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:27:17,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002136180] [2021-10-28 23:27:17,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:17,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:27:17,043 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 23:27:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:17,199 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-10-28 23:27:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:27:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 23:27:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:17,200 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:27:17,200 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:27:17,201 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 23:27:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:27:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-28 23:27:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 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 23:27:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 23:27:17,203 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 22 [2021-10-28 23:27:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:17,203 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 23:27:17,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 23:27:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 23:27:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:27:17,204 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:17,205 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:17,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 23:27:17,205 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2007435023, now seen corresponding path program 1 times [2021-10-28 23:27:17,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:17,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970690887] [2021-10-28 23:27:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:17,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,238 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 23:27:17,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970690887] [2021-10-28 23:27:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970690887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:17,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178886199] [2021-10-28 23:27:17,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:27:17,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:17,240 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 23:27:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:17,298 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-10-28 23:27:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 26 [2021-10-28 23:27:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:17,299 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:27:17,299 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 23:27:17,299 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 23:27:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 23:27:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 23:27:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 states have internal predecessors, (68), 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 23:27:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-28 23:27:17,302 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 26 [2021-10-28 23:27:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-28 23:27:17,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 23:27:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-28 23:27:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:27:17,303 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:17,303 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, 1, 1, 1] [2021-10-28 23:27:17,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 23:27:17,304 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 489090044, now seen corresponding path program 1 times [2021-10-28 23:27:17,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:17,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510397335] [2021-10-28 23:27:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:17,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,339 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 23:27:17,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510397335] [2021-10-28 23:27:17,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510397335] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:17,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947742704] [2021-10-28 23:27:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:27:17,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:17,341 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 23:27:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:17,397 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-10-28 23:27:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 29 [2021-10-28 23:27:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:17,398 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:27:17,398 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 23:27:17,398 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 23:27:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 23:27:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 23:27:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 58 states have internal predecessors, (66), 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 23:27:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-10-28 23:27:17,401 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 29 [2021-10-28 23:27:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:17,401 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-10-28 23:27:17,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 23:27:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-10-28 23:27:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:27:17,402 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:17,402 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, 1, 1, 1, 1, 1] [2021-10-28 23:27:17,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:27:17,402 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash -859100191, now seen corresponding path program 1 times [2021-10-28 23:27:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:17,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867696531] [2021-10-28 23:27:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:17,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,569 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 23:27:17,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867696531] [2021-10-28 23:27:17,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867696531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:27:17,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874782626] [2021-10-28 23:27:17,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:27:17,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:27:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:27:17,572 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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 23:27:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:17,846 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-10-28 23:27:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:27:17,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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 31 [2021-10-28 23:27:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:17,847 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:27:17,847 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 23:27:17,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:27:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 23:27:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-28 23:27:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 53 states have internal predecessors, (59), 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 23:27:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-10-28 23:27:17,858 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2021-10-28 23:27:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:17,859 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-10-28 23:27:17,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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 23:27:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-10-28 23:27:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:27:17,860 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:17,860 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, 1, 1, 1, 1, 1] [2021-10-28 23:27:17,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 23:27:17,861 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -718551581, now seen corresponding path program 1 times [2021-10-28 23:27:17,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:17,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348536013] [2021-10-28 23:27:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:17,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:18,097 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 23:27:18,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:18,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348536013] [2021-10-28 23:27:18,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348536013] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:18,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:18,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:27:18,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703707419] [2021-10-28 23:27:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:27:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:27:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:27:18,100 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 23:27:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:18,381 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-10-28 23:27:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:27:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 31 [2021-10-28 23:27:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:18,382 INFO L225 Difference]: With dead ends: 89 [2021-10-28 23:27:18,382 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:27:18,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:27:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:27:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-28 23:27:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 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 23:27:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-10-28 23:27:18,385 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 31 [2021-10-28 23:27:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-10-28 23:27:18,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 23:27:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-10-28 23:27:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:27:18,386 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:18,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:18,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 23:27:18,386 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:18,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2071968550, now seen corresponding path program 1 times [2021-10-28 23:27:18,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:18,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097394885] [2021-10-28 23:27:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:18,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:18,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:18,531 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 23:27:18,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:18,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097394885] [2021-10-28 23:27:18,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097394885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:18,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321057134] [2021-10-28 23:27:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:18,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:18,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:18,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:18,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:27:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:27:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:18,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:27:19,146 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:27:19,147 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 10 [2021-10-28 23:27:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:19,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321057134] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:19,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:27:19,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-10-28 23:27:19,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402947750] [2021-10-28 23:27:19,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:27:19,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:27:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:27:19,200 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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 23:27:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:19,539 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-10-28 23:27:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:27:19,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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 35 [2021-10-28 23:27:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:19,540 INFO L225 Difference]: With dead ends: 76 [2021-10-28 23:27:19,540 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 23:27:19,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:27:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 23:27:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 23:27:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 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 23:27:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-28 23:27:19,543 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-10-28 23:27:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-28 23:27:19,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 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 23:27:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-28 23:27:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:27:19,544 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:19,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:19,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:19,752 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1562495460, now seen corresponding path program 1 times [2021-10-28 23:27:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:19,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442167157] [2021-10-28 23:27:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:19,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,874 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 23:27:19,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:19,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442167157] [2021-10-28 23:27:19,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442167157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:19,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029634582] [2021-10-28 23:27:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:19,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:19,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:27:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:27:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:20,296 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 23:27:20,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029634582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:20,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:20,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 23:27:20,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268230047] [2021-10-28 23:27:20,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:27:20,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:27:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:27:20,297 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 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 23:27:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:20,572 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-10-28 23:27:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:27:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 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 35 [2021-10-28 23:27:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:20,573 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:27:20,573 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 23:27:20,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:27:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 23:27:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-10-28 23:27:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 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 23:27:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-10-28 23:27:20,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 35 [2021-10-28 23:27:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:20,576 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-10-28 23:27:20,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 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 23:27:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-10-28 23:27:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 23:27:20,577 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:20,577 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:20,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:20,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:27:20,778 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1192719032, now seen corresponding path program 1 times [2021-10-28 23:27:20,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:20,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751233144] [2021-10-28 23:27:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:20,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:21,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:21,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751233144] [2021-10-28 23:27:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751233144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:21,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:21,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 23:27:21,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547295666] [2021-10-28 23:27:21,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:27:21,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:27:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:27:21,049 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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 23:27:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:21,446 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-10-28 23:27:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:27:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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 36 [2021-10-28 23:27:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:21,449 INFO L225 Difference]: With dead ends: 84 [2021-10-28 23:27:21,449 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:27:21,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:27:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:27:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-10-28 23:27:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 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 23:27:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-28 23:27:21,452 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 36 [2021-10-28 23:27:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:21,453 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-28 23:27:21,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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 23:27:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-28 23:27:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:27:21,454 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:21,454 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:21,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 23:27:21,454 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1073097963, now seen corresponding path program 1 times [2021-10-28 23:27:21,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:21,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348154613] [2021-10-28 23:27:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:21,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:21,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:21,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348154613] [2021-10-28 23:27:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348154613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903127138] [2021-10-28 23:27:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:21,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:21,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:27:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:27:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:22,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903127138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:22,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:22,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-28 23:27:22,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867870244] [2021-10-28 23:27:22,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:27:22,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:27:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:27:22,062 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 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 23:27:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:22,351 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-28 23:27:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:27:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 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 40 [2021-10-28 23:27:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:22,352 INFO L225 Difference]: With dead ends: 72 [2021-10-28 23:27:22,352 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:27:22,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:27:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:27:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-10-28 23:27:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 58 states have internal predecessors, (62), 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 23:27:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-10-28 23:27:22,356 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 40 [2021-10-28 23:27:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-28 23:27:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 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 23:27:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-10-28 23:27:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:27:22,357 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:22,357 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:22,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:22,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:27:22,564 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -83218317, now seen corresponding path program 1 times [2021-10-28 23:27:22,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:22,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983597511] [2021-10-28 23:27:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:22,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:22,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:22,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983597511] [2021-10-28 23:27:22,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983597511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:22,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639362106] [2021-10-28 23:27:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:22,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:22,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:22,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:27:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:27:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:23,320 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 23:27:24,618 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-28 23:27:24,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-10-28 23:27:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639362106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:24,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:24,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-10-28 23:27:24,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843340735] [2021-10-28 23:27:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:27:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:27:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:27:24,685 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 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 23:27:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:28,604 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2021-10-28 23:27:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 23:27:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 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 49 [2021-10-28 23:27:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:28,605 INFO L225 Difference]: With dead ends: 168 [2021-10-28 23:27:28,605 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 23:27:28,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:27:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 23:27:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-28 23:27:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 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 23:27:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-10-28 23:27:28,610 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 49 [2021-10-28 23:27:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:28,610 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-10-28 23:27:28,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 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 23:27:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-10-28 23:27:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:27:28,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:28,612 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:28,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:28,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:27:28,833 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2107871545, now seen corresponding path program 2 times [2021-10-28 23:27:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:28,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751506989] [2021-10-28 23:27:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:28,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:28,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:28,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751506989] [2021-10-28 23:27:28,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751506989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:28,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740704268] [2021-10-28 23:27:28,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:27:28,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:28,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:28,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:28,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:27:29,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:27:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:27:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740704268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:29,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:29,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-28 23:27:29,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995561760] [2021-10-28 23:27:29,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:27:29,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:27:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:27:29,580 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 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 23:27:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:29,965 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-10-28 23:27:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:27:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 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 57 [2021-10-28 23:27:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:29,966 INFO L225 Difference]: With dead ends: 89 [2021-10-28 23:27:29,966 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 23:27:29,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:27:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 23:27:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-10-28 23:27:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 78 states have internal predecessors, (85), 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 23:27:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-10-28 23:27:29,970 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 57 [2021-10-28 23:27:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:29,970 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-10-28 23:27:29,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 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 23:27:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-10-28 23:27:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:27:29,971 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:29,971 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:29,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 23:27:30,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:27:30,184 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 919508483, now seen corresponding path program 2 times [2021-10-28 23:27:30,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:30,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210682690] [2021-10-28 23:27:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:30,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:30,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210682690] [2021-10-28 23:27:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210682690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368367004] [2021-10-28 23:27:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:27:30,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:30,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:30,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:30,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:27:30,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:27:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:27:30,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:30,640 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:30,640 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368367004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:31,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-28 23:27:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077641395] [2021-10-28 23:27:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:27:31,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:27:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:27:31,122 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 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 23:27:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:31,476 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-10-28 23:27:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:27:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 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 58 [2021-10-28 23:27:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:31,478 INFO L225 Difference]: With dead ends: 87 [2021-10-28 23:27:31,478 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 23:27:31,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:27:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 23:27:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-10-28 23:27:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 76 states have internal predecessors, (80), 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 23:27:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-10-28 23:27:31,481 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 58 [2021-10-28 23:27:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-10-28 23:27:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 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 23:27:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-10-28 23:27:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 23:27:31,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:31,483 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:31,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:31,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:31,696 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1530472123, now seen corresponding path program 3 times [2021-10-28 23:27:31,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:31,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623104696] [2021-10-28 23:27:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:31,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:31,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:31,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623104696] [2021-10-28 23:27:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623104696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:31,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799858156] [2021-10-28 23:27:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:27:31,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:31,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:31,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:27:32,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:27:32,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:27:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:32,349 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:32,349 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:32,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 23:27:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-10-28 23:27:33,617 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 23:27:33,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-10-28 23:27:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:33,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799858156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:33,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:33,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-10-28 23:27:33,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654928637] [2021-10-28 23:27:33,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:27:33,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:27:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:27:33,637 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 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 23:27:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:36,914 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2021-10-28 23:27:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 23:27:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 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 67 [2021-10-28 23:27:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:36,916 INFO L225 Difference]: With dead ends: 220 [2021-10-28 23:27:36,916 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 23:27:36,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=586, Invalid=4525, Unknown=1, NotChecked=0, Total=5112 [2021-10-28 23:27:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 23:27:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-10-28 23:27:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.1) internal successors, (88), 84 states have internal predecessors, (88), 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 23:27:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-10-28 23:27:36,922 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 67 [2021-10-28 23:27:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:36,922 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-10-28 23:27:36,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 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 23:27:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-10-28 23:27:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 23:27:36,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:36,923 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:36,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:37,140 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash -816089973, now seen corresponding path program 4 times [2021-10-28 23:27:37,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:37,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61260098] [2021-10-28 23:27:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:37,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:37,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:37,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61260098] [2021-10-28 23:27:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61260098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:37,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918417639] [2021-10-28 23:27:37,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:27:37,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:37,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:37,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:37,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:27:37,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:27:37,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:27:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 23:27:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-28 23:27:38,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:27:38,319 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:27:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 23:27:39,426 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-28 23:27:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-28 23:27:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:39,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918417639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:39,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:39,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-10-28 23:27:39,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93426168] [2021-10-28 23:27:39,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:27:39,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:39,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:27:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:27:39,604 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 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 23:27:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:40,854 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-10-28 23:27:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:27:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 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 75 [2021-10-28 23:27:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:40,855 INFO L225 Difference]: With dead ends: 107 [2021-10-28 23:27:40,855 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 23:27:40,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:27:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 23:27:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-10-28 23:27:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 96 states have internal predecessors, (103), 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 23:27:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-28 23:27:40,860 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 75 [2021-10-28 23:27:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:40,860 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-28 23:27:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 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 23:27:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-28 23:27:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 23:27:40,861 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:40,861 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:40,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:27:41,072 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 471014641, now seen corresponding path program 3 times [2021-10-28 23:27:41,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:41,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035250631] [2021-10-28 23:27:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:41,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:41,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035250631] [2021-10-28 23:27:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035250631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:41,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986504126] [2021-10-28 23:27:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:27:41,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:27:41,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:27:41,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:27:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:41,772 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:41,772 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:42,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986504126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:42,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:42,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-28 23:27:42,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737716504] [2021-10-28 23:27:42,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:27:42,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:27:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:27:42,458 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 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 23:27:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:43,058 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-10-28 23:27:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:27:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 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 76 [2021-10-28 23:27:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:43,059 INFO L225 Difference]: With dead ends: 105 [2021-10-28 23:27:43,060 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 23:27:43,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:27:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 23:27:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-10-28 23:27:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 94 states have internal predecessors, (98), 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 23:27:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-10-28 23:27:43,068 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 76 [2021-10-28 23:27:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:43,069 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-10-28 23:27:43,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 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 23:27:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-10-28 23:27:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 23:27:43,070 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:43,070 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:43,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:43,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:27:43,280 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash -109036009, now seen corresponding path program 5 times [2021-10-28 23:27:43,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939867883] [2021-10-28 23:27:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:43,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:43,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939867883] [2021-10-28 23:27:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939867883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:43,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344863661] [2021-10-28 23:27:43,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:27:43,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:43,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:27:44,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 23:27:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:27:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:44,317 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 23:27:45,428 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 23:27:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:27:45,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344863661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:45,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:45,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 32 [2021-10-28 23:27:45,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278181453] [2021-10-28 23:27:45,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:27:45,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:27:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:27:45,444 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 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 23:27:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:48,960 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2021-10-28 23:27:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 23:27:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 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 85 [2021-10-28 23:27:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:48,962 INFO L225 Difference]: With dead ends: 272 [2021-10-28 23:27:48,962 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 23:27:48,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 23:27:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 23:27:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-10-28 23:27:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 102 states have internal predecessors, (106), 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 23:27:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-10-28 23:27:48,968 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 85 [2021-10-28 23:27:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:48,968 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-10-28 23:27:48,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 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 23:27:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-10-28 23:27:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 23:27:48,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:48,969 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:49,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:49,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:49,196 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -171019299, now seen corresponding path program 6 times [2021-10-28 23:27:49,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:49,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002931977] [2021-10-28 23:27:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:49,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:27:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002931977] [2021-10-28 23:27:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002931977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938379130] [2021-10-28 23:27:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:27:49,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:49,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:49,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:27:50,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:27:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:27:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:50,284 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:50,284 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:51,142 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 23:27:52,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:27:52,339 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 28 treesize of output 32 [2021-10-28 23:27:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:27:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938379130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:52,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:52,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-10-28 23:27:52,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85347727] [2021-10-28 23:27:52,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:27:52,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:27:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:27:52,567 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 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 23:27:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:53,970 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-10-28 23:27:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:27:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 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 93 [2021-10-28 23:27:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:53,971 INFO L225 Difference]: With dead ends: 125 [2021-10-28 23:27:53,971 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 23:27:53,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 23:27:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 23:27:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-10-28 23:27:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.1) internal successors, (121), 114 states have internal predecessors, (121), 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 23:27:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2021-10-28 23:27:53,976 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 93 [2021-10-28 23:27:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:53,976 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2021-10-28 23:27:53,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 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 23:27:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2021-10-28 23:27:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 23:27:53,977 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:53,978 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:54,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:54,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:54,196 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1006630945, now seen corresponding path program 4 times [2021-10-28 23:27:54,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:54,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700147444] [2021-10-28 23:27:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:54,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:27:54,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:54,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700147444] [2021-10-28 23:27:54,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700147444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:54,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939095398] [2021-10-28 23:27:54,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:27:54,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:54,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:54,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:27:55,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:27:55,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:27:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 23:27:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:55,401 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:27:55,402 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:27:55,702 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 23:27:56,662 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-10-28 23:27:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-10-28 23:27:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:27:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939095398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:56,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:56,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 31 [2021-10-28 23:27:56,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396022702] [2021-10-28 23:27:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:27:56,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:27:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:27:56,861 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 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 23:27:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:58,183 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-10-28 23:27:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:27:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 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 94 [2021-10-28 23:27:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:58,184 INFO L225 Difference]: With dead ends: 123 [2021-10-28 23:27:58,185 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 23:27:58,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:27:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 23:27:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-10-28 23:27:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 112 states have internal predecessors, (116), 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 23:27:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-10-28 23:27:58,189 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 94 [2021-10-28 23:27:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:58,189 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-10-28 23:27:58,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 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 23:27:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-10-28 23:27:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-28 23:27:58,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:58,191 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:58,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:58,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 23:27:58,400 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:27:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1195262231, now seen corresponding path program 7 times [2021-10-28 23:27:58,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:58,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117083212] [2021-10-28 23:27:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:58,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:27:58,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:58,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117083212] [2021-10-28 23:27:58,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117083212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:58,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240577035] [2021-10-28 23:27:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:27:58,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:58,798 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:27:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 23:27:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:59,772 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 23:28:01,751 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 23:28:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:28:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240577035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:01,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 36 [2021-10-28 23:28:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717228502] [2021-10-28 23:28:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 23:28:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 23:28:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1186, Unknown=1, NotChecked=0, Total=1260 [2021-10-28 23:28:01,765 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 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 23:28:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:06,044 INFO L93 Difference]: Finished difference Result 324 states and 328 transitions. [2021-10-28 23:28:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-28 23:28:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 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 103 [2021-10-28 23:28:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:06,045 INFO L225 Difference]: With dead ends: 324 [2021-10-28 23:28:06,045 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 23:28:06,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=492, Invalid=6148, Unknown=2, NotChecked=0, Total=6642 [2021-10-28 23:28:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 23:28:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-10-28 23:28:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 120 states have internal predecessors, (124), 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 23:28:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-10-28 23:28:06,051 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 103 [2021-10-28 23:28:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:06,051 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-10-28 23:28:06,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 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 23:28:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-10-28 23:28:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 23:28:06,053 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:06,053 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:06,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:06,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:06,260 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1001385775, now seen corresponding path program 8 times [2021-10-28 23:28:06,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:06,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78669481] [2021-10-28 23:28:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:06,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:06,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:06,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78669481] [2021-10-28 23:28:06,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78669481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:06,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7700251] [2021-10-28 23:28:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:28:06,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:06,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:28:07,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:28:07,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:28:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:08,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7700251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:08,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:08,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-10-28 23:28:08,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909164753] [2021-10-28 23:28:08,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:28:08,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:28:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:28:08,079 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 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 23:28:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:08,869 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-10-28 23:28:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:28:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 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 111 [2021-10-28 23:28:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:08,871 INFO L225 Difference]: With dead ends: 143 [2021-10-28 23:28:08,871 INFO L226 Difference]: Without dead ends: 143 [2021-10-28 23:28:08,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:28:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-28 23:28:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-10-28 23:28:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.0859375) internal successors, (139), 132 states have internal predecessors, (139), 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 23:28:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2021-10-28 23:28:08,877 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 111 [2021-10-28 23:28:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:08,877 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2021-10-28 23:28:08,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 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 23:28:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2021-10-28 23:28:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 23:28:08,879 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:08,879 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:08,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:09,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:28:09,084 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 978187981, now seen corresponding path program 5 times [2021-10-28 23:28:09,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:09,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521719552] [2021-10-28 23:28:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:09,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:09,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:09,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:09,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521719552] [2021-10-28 23:28:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521719552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:09,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216542072] [2021-10-28 23:28:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:28:09,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:09,370 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:28:10,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:28:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 23:28:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:10,334 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:28:10,334 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:28:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216542072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:11,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:11,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2021-10-28 23:28:11,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794887580] [2021-10-28 23:28:11,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:28:11,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:28:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:28:11,035 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 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 23:28:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:11,616 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-10-28 23:28:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:28:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 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 112 [2021-10-28 23:28:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:11,617 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:28:11,618 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 23:28:11,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:28:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 23:28:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-10-28 23:28:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 130 states have internal predecessors, (134), 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 23:28:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2021-10-28 23:28:11,622 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 112 [2021-10-28 23:28:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2021-10-28 23:28:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 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 23:28:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2021-10-28 23:28:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-28 23:28:11,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:11,624 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:11,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:11,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:28:11,836 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1820769211, now seen corresponding path program 9 times [2021-10-28 23:28:11,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:11,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237739957] [2021-10-28 23:28:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:11,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:12,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:12,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237739957] [2021-10-28 23:28:12,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237739957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:12,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033973892] [2021-10-28 23:28:12,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:28:12,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:12,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:12,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:28:13,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-28 23:28:13,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-28 23:28:13,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:13,810 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 23:28:15,386 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 23:28:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 23:28:15,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033973892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:15,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:15,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 40 [2021-10-28 23:28:15,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237257039] [2021-10-28 23:28:15,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 23:28:15,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 23:28:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:28:15,400 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 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 23:28:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:19,856 INFO L93 Difference]: Finished difference Result 376 states and 380 transitions. [2021-10-28 23:28:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-28 23:28:19,856 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 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 121 [2021-10-28 23:28:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:19,857 INFO L225 Difference]: With dead ends: 376 [2021-10-28 23:28:19,857 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 23:28:19,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 23:28:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 23:28:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-10-28 23:28:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 138 states have internal predecessors, (142), 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 23:28:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2021-10-28 23:28:19,862 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 121 [2021-10-28 23:28:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:19,863 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2021-10-28 23:28:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 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 23:28:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2021-10-28 23:28:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-28 23:28:19,864 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:19,865 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:19,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:20,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:28:20,076 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1138538879, now seen corresponding path program 10 times [2021-10-28 23:28:20,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:20,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643718085] [2021-10-28 23:28:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:20,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 23:28:20,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:20,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643718085] [2021-10-28 23:28:20,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643718085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:20,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942683768] [2021-10-28 23:28:20,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:28:20,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:20,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:20,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:20,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:28:21,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:28:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 23:28:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:21,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:28:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:28:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 23:28:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:28:22,669 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:28:22,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 23:28:24,415 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-28 23:28:24,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-28 23:28:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 50 proven. 184 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 23:28:24,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942683768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:24,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:24,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2021-10-28 23:28:24,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845375813] [2021-10-28 23:28:24,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 23:28:24,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 23:28:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:28:24,623 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 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 23:28:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:27,075 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-10-28 23:28:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:28:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 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 129 [2021-10-28 23:28:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:27,077 INFO L225 Difference]: With dead ends: 161 [2021-10-28 23:28:27,077 INFO L226 Difference]: Without dead ends: 161 [2021-10-28 23:28:27,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:28:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-28 23:28:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-10-28 23:28:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 146 states have (on average 1.0753424657534247) internal successors, (157), 150 states have internal predecessors, (157), 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 23:28:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-10-28 23:28:27,082 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 129 [2021-10-28 23:28:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:27,083 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-10-28 23:28:27,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 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 23:28:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-10-28 23:28:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 23:28:27,085 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:27,085 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:27,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:27,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:28:27,286 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -934966853, now seen corresponding path program 6 times [2021-10-28 23:28:27,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:27,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215497605] [2021-10-28 23:28:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:27,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 23:28:27,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215497605] [2021-10-28 23:28:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215497605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613078061] [2021-10-28 23:28:27,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:28:27,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:27,662 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:27,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:28:29,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:28:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 23:28:29,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:29,227 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:28:29,228 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:28:29,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 23:28:29,922 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-10-28 23:28:29,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-10-28 23:28:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-10-28 23:28:30,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613078061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:30,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:30,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-10-28 23:28:30,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495956586] [2021-10-28 23:28:30,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 23:28:30,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 23:28:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:28:30,064 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 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 23:28:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:32,244 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-10-28 23:28:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 23:28:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 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 130 [2021-10-28 23:28:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:32,246 INFO L225 Difference]: With dead ends: 153 [2021-10-28 23:28:32,246 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 23:28:32,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=621, Invalid=4209, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 23:28:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 23:28:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-10-28 23:28:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 144 states have internal predecessors, (148), 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 23:28:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-10-28 23:28:32,251 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 130 [2021-10-28 23:28:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:32,252 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-10-28 23:28:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 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 23:28:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-10-28 23:28:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-28 23:28:32,253 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:32,254 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:32,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:32,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:28:32,472 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1556441971, now seen corresponding path program 11 times [2021-10-28 23:28:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:32,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929065678] [2021-10-28 23:28:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:32,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 23:28:32,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:32,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929065678] [2021-10-28 23:28:32,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929065678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:32,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358593586] [2021-10-28 23:28:32,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:28:32,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:32,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:32,961 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:32,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:28:34,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 23:28:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 23:28:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:34,620 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 23:28:36,145 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 23:28:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 23:28:36,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358593586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:36,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 44 [2021-10-28 23:28:36,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645405654] [2021-10-28 23:28:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 23:28:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 23:28:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:28:36,161 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 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 23:28:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:41,425 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2021-10-28 23:28:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-28 23:28:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 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 139 [2021-10-28 23:28:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:41,426 INFO L225 Difference]: With dead ends: 424 [2021-10-28 23:28:41,427 INFO L226 Difference]: Without dead ends: 163 [2021-10-28 23:28:41,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=568, Invalid=8938, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 23:28:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-28 23:28:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-10-28 23:28:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.04) internal successors, (156), 152 states have internal predecessors, (156), 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 23:28:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-10-28 23:28:41,431 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 139 [2021-10-28 23:28:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:41,432 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-10-28 23:28:41,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 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 23:28:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-10-28 23:28:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-28 23:28:41,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:41,434 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:41,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:28:41,652 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:41,652 INFO L85 PathProgramCache]: Analyzing trace with hash 482073043, now seen corresponding path program 12 times [2021-10-28 23:28:41,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:41,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795858116] [2021-10-28 23:28:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:41,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:42,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 45 proven. 277 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 23:28:42,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:42,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795858116] [2021-10-28 23:28:42,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795858116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:42,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184384602] [2021-10-28 23:28:42,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:28:42,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:42,028 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:42,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:28:43,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 23:28:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 23:28:43,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:43,936 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:28:43,936 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 23:28:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 23:28:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 23:28:45,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184384602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:45,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:45,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-10-28 23:28:45,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206000767] [2021-10-28 23:28:45,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 23:28:45,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 23:28:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:28:45,212 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 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 23:28:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:46,500 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2021-10-28 23:28:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:28:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 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 147 [2021-10-28 23:28:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:46,502 INFO L225 Difference]: With dead ends: 171 [2021-10-28 23:28:46,502 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 23:28:46,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=2731, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:28:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 23:28:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-10-28 23:28:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 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 23:28:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2021-10-28 23:28:46,507 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 147 [2021-10-28 23:28:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:46,508 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2021-10-28 23:28:46,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 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 23:28:46,508 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2021-10-28 23:28:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-28 23:28:46,509 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:46,509 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:46,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:46,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:28:46,712 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash 699967839, now seen corresponding path program 13 times [2021-10-28 23:28:46,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:46,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602918689] [2021-10-28 23:28:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:46,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 23:28:47,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:47,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602918689] [2021-10-28 23:28:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602918689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:47,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246422531] [2021-10-28 23:28:47,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:28:47,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:47,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:47,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:28:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-28 23:28:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:49,125 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 23:28:50,909 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 23:28:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 23:28:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246422531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:50,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:50,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 48 [2021-10-28 23:28:50,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574073314] [2021-10-28 23:28:50,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 23:28:50,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 23:28:50,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:28:50,922 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 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 23:28:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:57,138 INFO L93 Difference]: Finished difference Result 476 states and 480 transitions. [2021-10-28 23:28:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-28 23:28:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 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 157 [2021-10-28 23:28:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:57,141 INFO L225 Difference]: With dead ends: 476 [2021-10-28 23:28:57,141 INFO L226 Difference]: Without dead ends: 181 [2021-10-28 23:28:57,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=606, Invalid=10524, Unknown=0, NotChecked=0, Total=11130 [2021-10-28 23:28:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-28 23:28:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-10-28 23:28:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 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 23:28:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-10-28 23:28:57,148 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 157 [2021-10-28 23:28:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:57,148 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-10-28 23:28:57,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 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 23:28:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-10-28 23:28:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 23:28:57,150 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:57,150 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:57,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:57,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:57,359 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:28:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1199376677, now seen corresponding path program 14 times [2021-10-28 23:28:57,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:57,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947986078] [2021-10-28 23:28:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:57,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 23:28:57,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:57,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947986078] [2021-10-28 23:28:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947986078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:57,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841507575] [2021-10-28 23:28:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:28:57,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:57,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:57,826 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:28:59,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:28:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:28:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 23:28:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 23:29:00,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841507575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:00,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-10-28 23:29:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998030142] [2021-10-28 23:29:00,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 23:29:00,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 23:29:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:29:00,377 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 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 23:29:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:01,513 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2021-10-28 23:29:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:29:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 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 165 [2021-10-28 23:29:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:01,514 INFO L225 Difference]: With dead ends: 189 [2021-10-28 23:29:01,514 INFO L226 Difference]: Without dead ends: 187 [2021-10-28 23:29:01,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:29:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-28 23:29:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-10-28 23:29:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 180 states have internal predecessors, (184), 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 23:29:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2021-10-28 23:29:01,523 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 165 [2021-10-28 23:29:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:01,524 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2021-10-28 23:29:01,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 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 23:29:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2021-10-28 23:29:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-28 23:29:01,525 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:01,525 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:01,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:01,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-28 23:29:01,752 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:29:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1162631729, now seen corresponding path program 15 times [2021-10-28 23:29:01,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:01,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302875393] [2021-10-28 23:29:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:01,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:02,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:29:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 23:29:02,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:02,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302875393] [2021-10-28 23:29:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302875393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:02,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394283760] [2021-10-28 23:29:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:29:02,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:02,409 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:02,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:29:04,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:29:04,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-28 23:29:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:05,242 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 23:29:07,246 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 23:29:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 23:29:07,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394283760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:07,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:07,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 52 [2021-10-28 23:29:07,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107268274] [2021-10-28 23:29:07,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 23:29:07,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 23:29:07,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:29:07,261 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 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 23:29:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:14,493 INFO L93 Difference]: Finished difference Result 528 states and 532 transitions. [2021-10-28 23:29:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-28 23:29:14,494 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 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 175 [2021-10-28 23:29:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:14,495 INFO L225 Difference]: With dead ends: 528 [2021-10-28 23:29:14,495 INFO L226 Difference]: Without dead ends: 199 [2021-10-28 23:29:14,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=644, Invalid=12238, Unknown=0, NotChecked=0, Total=12882 [2021-10-28 23:29:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-28 23:29:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2021-10-28 23:29:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.032258064516129) internal successors, (192), 188 states have internal predecessors, (192), 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 23:29:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-10-28 23:29:14,501 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 175 [2021-10-28 23:29:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:14,502 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-10-28 23:29:14,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 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 23:29:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-10-28 23:29:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-10-28 23:29:14,503 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:14,504 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:14,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:14,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:14,716 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:29:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 618280055, now seen corresponding path program 16 times [2021-10-28 23:29:14,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:14,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635883348] [2021-10-28 23:29:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:14,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:29:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 23:29:15,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:15,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635883348] [2021-10-28 23:29:15,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635883348] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:15,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61382579] [2021-10-28 23:29:15,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:29:15,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:15,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:15,239 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:15,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:29:17,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:29:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-28 23:29:17,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:17,160 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:29:17,161 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:29:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 23:29:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:29:18,641 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:29:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 23:29:21,356 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-28 23:29:21,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-28 23:29:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 128 proven. 412 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 23:29:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61382579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:21,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:21,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 50 [2021-10-28 23:29:21,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740065933] [2021-10-28 23:29:21,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 23:29:21,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 23:29:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2349, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 23:29:21,594 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 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 23:29:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:25,261 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2021-10-28 23:29:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:29:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 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 183 [2021-10-28 23:29:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:25,282 INFO L225 Difference]: With dead ends: 207 [2021-10-28 23:29:25,282 INFO L226 Difference]: Without dead ends: 205 [2021-10-28 23:29:25,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=410, Invalid=4146, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 23:29:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-28 23:29:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-10-28 23:29:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.030612244897959) internal successors, (202), 198 states have internal predecessors, (202), 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 23:29:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2021-10-28 23:29:25,289 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 183 [2021-10-28 23:29:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:25,290 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2021-10-28 23:29:25,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 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 23:29:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2021-10-28 23:29:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-28 23:29:25,292 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:25,292 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:25,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:25,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 23:29:25,516 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:29:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -307165437, now seen corresponding path program 17 times [2021-10-28 23:29:25,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:25,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404658334] [2021-10-28 23:29:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:25,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:26,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:29:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 23:29:26,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404658334] [2021-10-28 23:29:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404658334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178639541] [2021-10-28 23:29:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:29:26,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:26,168 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:26,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:29:28,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-28 23:29:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 23:29:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:28,953 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 23:29:30,978 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 23:29:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 23:29:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178639541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:30,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:30,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 56 [2021-10-28 23:29:30,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508700981] [2021-10-28 23:29:30,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 23:29:30,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 23:29:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:29:30,993 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 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 23:29:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:39,366 INFO L93 Difference]: Finished difference Result 580 states and 584 transitions. [2021-10-28 23:29:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-28 23:29:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 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 193 [2021-10-28 23:29:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:39,368 INFO L225 Difference]: With dead ends: 580 [2021-10-28 23:29:39,368 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 23:29:39,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=682, Invalid=14080, Unknown=0, NotChecked=0, Total=14762 [2021-10-28 23:29:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 23:29:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2021-10-28 23:29:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 204 states have (on average 1.0294117647058822) internal successors, (210), 206 states have internal predecessors, (210), 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 23:29:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2021-10-28 23:29:39,375 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 193 [2021-10-28 23:29:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:39,375 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2021-10-28 23:29:39,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 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 23:29:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2021-10-28 23:29:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-28 23:29:39,377 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:39,377 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:39,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:39,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 23:29:39,592 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-28 23:29:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1438038985, now seen corresponding path program 18 times [2021-10-28 23:29:39,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:39,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079279213] [2021-10-28 23:29:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:39,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:40,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:29:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-28 23:29:40,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:40,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079279213] [2021-10-28 23:29:40,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079279213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:40,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756563455] [2021-10-28 23:29:40,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:29:40,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:40,107 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:40,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:29:44,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-28 23:29:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 23:29:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:44,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:29:44,539 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 23:29:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 23:29:45,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 23:29:45,597 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 23:29:45,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-28 23:29:47,592 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-10-28 23:29:47,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2021-10-28 23:29:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-10-28 23:29:47,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756563455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:47,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:47,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-10-28 23:29:47,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724703104] [2021-10-28 23:29:47,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:29:47,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:29:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:29:47,757 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 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 23:29:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:51,147 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-10-28 23:29:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 23:29:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 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 201 [2021-10-28 23:29:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:51,148 INFO L225 Difference]: With dead ends: 210 [2021-10-28 23:29:51,148 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:29:51,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:29:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:29:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:29:51,149 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 23:29:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:29:51,150 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2021-10-28 23:29:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:51,150 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:29:51,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 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 23:29:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:29:51,151 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:29:51,153 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:29:51,153 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:29:51,153 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:29:51,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:29:51,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 23:29:51,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 23:29:51,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 23:29:51,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr0REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr1REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr2REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr3REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr4REQUIRES_VIOLATION [2021-10-28 23:29:51,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr5REQUIRES_VIOLATION [2021-10-28 23:29:51,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr6REQUIRES_VIOLATION [2021-10-28 23:29:51,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr7REQUIRES_VIOLATION [2021-10-28 23:29:51,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr8REQUIRES_VIOLATION [2021-10-28 23:29:51,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr9REQUIRES_VIOLATION [2021-10-28 23:29:51,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 23:29:51,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:51,370 INFO L731 BasicCegarLoop]: Path program histogram: [18, 6, 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 23:29:51,372 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:29:51,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:29:51 BoogieIcfgContainer [2021-10-28 23:29:51,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:29:51,375 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:29:51,376 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:29:51,376 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:29:51,376 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:11" (3/4) ... [2021-10-28 23:29:51,379 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:29:51,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:29:51,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncmp [2021-10-28 23:29:51,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 23:29:51,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-28 23:29:51,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 23:29:51,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 23:29:51,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:29:51,431 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:29:51,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:29:51,432 INFO L168 Benchmark]: Toolchain (without parser) took 160989.56 ms. Allocated memory was 96.5 MB in the beginning and 685.8 MB in the end (delta: 589.3 MB). Free memory was 54.5 MB in the beginning and 129.9 MB in the end (delta: -75.4 MB). Peak memory consumption was 512.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,433 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:51,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.27 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 65.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,434 INFO L168 Benchmark]: Boogie Preprocessor took 55.77 ms. Allocated memory is still 96.5 MB. Free memory was 65.5 MB in the beginning and 63.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,434 INFO L168 Benchmark]: RCFGBuilder took 671.20 ms. Allocated memory is still 96.5 MB. Free memory was 63.0 MB in the beginning and 41.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,434 INFO L168 Benchmark]: TraceAbstraction took 159665.06 ms. Allocated memory was 96.5 MB in the beginning and 685.8 MB in the end (delta: 589.3 MB). Free memory was 41.3 MB in the beginning and 134.7 MB in the end (delta: -93.4 MB). Peak memory consumption was 497.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,435 INFO L168 Benchmark]: Witness Printer took 56.23 ms. Allocated memory is still 685.8 MB. Free memory was 134.7 MB in the beginning and 129.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:51,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 529.27 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 65.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.77 ms. Allocated memory is still 96.5 MB. Free memory was 65.5 MB in the beginning and 63.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 671.20 ms. Allocated memory is still 96.5 MB. Free memory was 63.0 MB in the beginning and 41.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 159665.06 ms. Allocated memory was 96.5 MB in the beginning and 685.8 MB in the end (delta: 589.3 MB). Free memory was 41.3 MB in the beginning and 134.7 MB in the end (delta: -93.4 MB). Peak memory consumption was 497.2 MB. Max. memory is 16.1 GB. * Witness Printer took 56.23 ms. Allocated memory is still 685.8 MB. Free memory was 134.7 MB in the beginning and 129.9 MB in the end (delta: 4.7 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: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 81 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 159.6s, OverallIterations: 46, TraceHistogramMax: 11, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 71.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2341 SDtfs, 9806 SDslu, 10329 SDs, 0 SdLazy, 68163 SolverSat, 1160 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 35.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4187 GetRequests, 2551 SyntacticMatches, 29 SemanticMatches, 1607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18659 ImplicationChecksByTransitivity, 47.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=45, InterpolantAutomatonStates: 1051, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 46 MinimizatonAttempts, 231 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 51.2s InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6032 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 6010 ConstructedInterpolants, 851 QuantifiedInterpolants, 69318 SizeOfPredicates, 287 NumberOfNonLiveVariables, 10475 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 74 InterpolantComputations, 19 PerfectInterpolantSequences, 4841/13756 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 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:29:51,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740bd04-2957-4c93-b996-2d5a0ffd275b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...