./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y --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 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:52:07,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:52:07,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:52:07,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:52:07,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:52:07,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:52:07,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:52:07,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:52:07,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:52:07,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:52:07,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:52:07,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:52:07,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:52:07,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:52:07,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:52:07,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:52:07,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:52:07,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:52:07,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:52:07,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:52:07,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:52:07,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:52:07,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:52:07,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:52:07,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:52:07,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:52:07,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:52:07,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:52:07,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:52:07,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:52:07,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:52:07,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:52:07,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:52:07,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:52:07,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:52:07,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:52:07,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:52:07,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:52:07,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:52:07,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:52:07,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:52:07,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 17:52:07,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:52:07,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:52:07,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:52:07,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:52:07,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:52:07,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:52:07,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:52:07,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:52:07,224 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:52:07,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:52:07,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:52:07,225 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 17:52:07,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:52:07,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:52:07,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:52:07,226 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 17:52:07,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 17:52:07,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 17:52:07,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:52:07,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 17:52:07,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:52:07,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:52:07,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:52:07,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:52:07,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:52:07,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:52:07,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:52:07,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:52:07,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:52:07,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:52:07,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:52:07,232 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_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 [2021-11-13 17:52:07,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:52:07,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:52:07,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:52:07,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:52:07,515 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:52:07,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-11-13 17:52:07,582 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/data/485d6e843/d91412fd6a5242bf9de59bd07830f586/FLAGb3aca00f0 [2021-11-13 17:52:08,135 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:52:08,139 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2021-11-13 17:52:08,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/data/485d6e843/d91412fd6a5242bf9de59bd07830f586/FLAGb3aca00f0 [2021-11-13 17:52:08,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/data/485d6e843/d91412fd6a5242bf9de59bd07830f586 [2021-11-13 17:52:08,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:52:08,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 17:52:08,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:52:08,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:52:08,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:52:08,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:52:08" (1/1) ... [2021-11-13 17:52:08,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7b9dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:08, skipping insertion in model container [2021-11-13 17:52:08,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:52:08" (1/1) ... [2021-11-13 17:52:08,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:52:08,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:52:08,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:52:08,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:52:09,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:52:09,059 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:52:09,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09 WrapperNode [2021-11-13 17:52:09,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:52:09,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:52:09,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:52:09,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:52:09,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:52:09,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:52:09,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:52:09,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:52:09,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (1/1) ... [2021-11-13 17:52:09,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:52:09,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:09,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:52:09,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:52:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 17:52:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:52:09,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2021-11-13 17:52:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2021-11-13 17:52:09,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 17:52:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 17:52:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 17:52:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 17:52:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 17:52:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 17:52:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 17:52:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 17:52:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 17:52:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 17:52:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 17:52:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 17:52:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 17:52:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 17:52:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 17:52:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 17:52:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 17:52:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 17:52:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 17:52:09,248 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 17:52:09,249 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 17:52:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 17:52:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 17:52:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 17:52:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 17:52:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 17:52:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 17:52:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 17:52:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-13 17:52:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2021-11-13 17:52:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:52:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 17:52:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:52:09,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:52:09,828 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:52:09,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:52:09 BoogieIcfgContainer [2021-11-13 17:52:09,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:52:09,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:52:09,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:52:09,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:52:09,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:52:08" (1/3) ... [2021-11-13 17:52:09,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61359be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:52:09, skipping insertion in model container [2021-11-13 17:52:09,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:52:09" (2/3) ... [2021-11-13 17:52:09,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61359be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:52:09, skipping insertion in model container [2021-11-13 17:52:09,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:52:09" (3/3) ... [2021-11-13 17:52:09,850 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2021-11-13 17:52:09,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:52:09,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-13 17:52:09,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:52:09,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:52:09,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-13 17:52:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-13 17:52:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:52:09,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:09,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:09,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2021-11-13 17:52:09,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:09,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769660285] [2021-11-13 17:52:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:10,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:10,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769660285] [2021-11-13 17:52:10,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769660285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:10,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:10,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:52:10,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387780930] [2021-11-13 17:52:10,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:10,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:52:10,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:10,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:52:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:52:10,205 INFO L87 Difference]: Start difference. First operand has 56 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:10,330 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-11-13 17:52:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:52:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-11-13 17:52:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:10,342 INFO L225 Difference]: With dead ends: 56 [2021-11-13 17:52:10,343 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 17:52:10,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:52:10,351 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.62ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:10,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 41 Unknown, 0 Unchecked, 8.62ms Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 88.57ms Time] [2021-11-13 17:52:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 17:52:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-13 17:52:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 45 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-13 17:52:10,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2021-11-13 17:52:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:10,397 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-13 17:52:10,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-13 17:52:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:52:10,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:10,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:10,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:52:10,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2021-11-13 17:52:10,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:10,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543275622] [2021-11-13 17:52:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:10,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:10,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:10,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543275622] [2021-11-13 17:52:10,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543275622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:10,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:10,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:52:10,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787586425] [2021-11-13 17:52:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:10,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:52:10,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:52:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:52:10,547 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:10,646 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-13 17:52:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:52:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (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 11 [2021-11-13 17:52:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:10,648 INFO L225 Difference]: With dead ends: 51 [2021-11-13 17:52:10,648 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 17:52:10,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:52:10,650 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:10,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 56 Invalid, 75 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 85.45ms Time] [2021-11-13 17:52:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 17:52:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-13 17:52:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.6) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-11-13 17:52:10,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2021-11-13 17:52:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-11-13 17:52:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-11-13 17:52:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:52:10,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:10,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:10,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:52:10,661 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr3REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2021-11-13 17:52:10,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:10,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463185558] [2021-11-13 17:52:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:10,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:10,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:10,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463185558] [2021-11-13 17:52:10,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463185558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:10,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:10,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:52:10,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606528128] [2021-11-13 17:52:10,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:10,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:10,755 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:10,894 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-13 17:52:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:52:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-11-13 17:52:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:10,898 INFO L225 Difference]: With dead ends: 50 [2021-11-13 17:52:10,898 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 17:52:10,900 INFO L932 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 [2021-11-13 17:52:10,906 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:10,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 79 Invalid, 93 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 101.98ms Time] [2021-11-13 17:52:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 17:52:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-13 17:52:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 42 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-13 17:52:10,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2021-11-13 17:52:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:10,925 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-13 17:52:10,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-13 17:52:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:52:10,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:10,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:10,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:52:10,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2021-11-13 17:52:10,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:10,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230851396] [2021-11-13 17:52:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:10,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:11,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230851396] [2021-11-13 17:52:11,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230851396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:11,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:11,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:11,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849753559] [2021-11-13 17:52:11,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:11,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:11,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:11,082 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:11,181 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-11-13 17:52:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:52:11,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-11-13 17:52:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:11,185 INFO L225 Difference]: With dead ends: 56 [2021-11-13 17:52:11,185 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 17:52:11,186 INFO L932 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 [2021-11-13 17:52:11,197 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 31 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:11,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 67 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 80.09ms Time] [2021-11-13 17:52:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 17:52:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-13 17:52:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.53125) internal successors, (49), 44 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-13 17:52:11,211 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2021-11-13 17:52:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:11,212 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-13 17:52:11,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-13 17:52:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:52:11,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:11,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:11,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:52:11,213 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2021-11-13 17:52:11,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:11,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838018613] [2021-11-13 17:52:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:11,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:11,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:11,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838018613] [2021-11-13 17:52:11,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838018613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:11,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:11,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:52:11,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174906216] [2021-11-13 17:52:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:11,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:11,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:11,368 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:11,550 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-13 17:52:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:52:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-11-13 17:52:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:11,555 INFO L225 Difference]: With dead ends: 60 [2021-11-13 17:52:11,556 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 17:52:11,556 INFO L932 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 [2021-11-13 17:52:11,557 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:11,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 111 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 155.14ms Time] [2021-11-13 17:52:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 17:52:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-13 17:52:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 46 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-13 17:52:11,575 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2021-11-13 17:52:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:11,576 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-13 17:52:11,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-13 17:52:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 17:52:11,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:11,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:11,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:52:11,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2021-11-13 17:52:11,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:11,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724173487] [2021-11-13 17:52:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:11,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:11,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724173487] [2021-11-13 17:52:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724173487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348208377] [2021-11-13 17:52:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:11,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:11,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:11,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:52:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:52:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:11,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:52:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:52:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:12,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348208377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:52:12,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:52:12,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-13 17:52:12,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136750524] [2021-11-13 17:52:12,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:52:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:52:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:52:12,340 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:12,580 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-13 17:52:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:52:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 2 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 15 [2021-11-13 17:52:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:12,582 INFO L225 Difference]: With dead ends: 64 [2021-11-13 17:52:12,582 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 17:52:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:52:12,583 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.19ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:12,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 106 Invalid, 189 Unknown, 0 Unchecked, 4.19ms Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 174.41ms Time] [2021-11-13 17:52:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 17:52:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2021-11-13 17:52:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.5) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-11-13 17:52:12,588 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 15 [2021-11-13 17:52:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:12,588 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-11-13 17:52:12,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:52:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-11-13 17:52:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 17:52:12,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:12,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:12,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:12,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:12,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrchrErr0REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2021-11-13 17:52:12,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:12,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532702341] [2021-11-13 17:52:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:12,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:12,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:12,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:12,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532702341] [2021-11-13 17:52:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532702341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:12,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:12,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 17:52:12,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759786612] [2021-11-13 17:52:12,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:12,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:52:12,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:52:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:52:12,922 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:13,153 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-11-13 17:52:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:52:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-13 17:52:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:13,154 INFO L225 Difference]: With dead ends: 47 [2021-11-13 17:52:13,154 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 17:52:13,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:52:13,155 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:13,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 107 Invalid, 243 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 155.63ms Time] [2021-11-13 17:52:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 17:52:13,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-13 17:52:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.375) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-13 17:52:13,160 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2021-11-13 17:52:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:13,160 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-13 17:52:13,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-13 17:52:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 17:52:13,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:13,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:13,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:52:13,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2021-11-13 17:52:13,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:13,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808548110] [2021-11-13 17:52:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:13,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:13,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:13,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808548110] [2021-11-13 17:52:13,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808548110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:13,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:13,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-13 17:52:13,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013307063] [2021-11-13 17:52:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:13,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:52:13,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:52:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:52:13,412 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:13,733 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-13 17:52:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:52:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-13 17:52:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:13,734 INFO L225 Difference]: With dead ends: 57 [2021-11-13 17:52:13,734 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 17:52:13,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:52:13,735 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 200.39ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:13,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 94 Invalid, 302 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [15 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 200.39ms Time] [2021-11-13 17:52:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 17:52:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-13 17:52:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 45 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-13 17:52:13,740 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2021-11-13 17:52:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:13,740 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-13 17:52:13,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-13 17:52:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 17:52:13,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:13,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:13,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:52:13,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2021-11-13 17:52:13,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:13,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759584221] [2021-11-13 17:52:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:13,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:13,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:13,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759584221] [2021-11-13 17:52:13,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759584221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:13,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:13,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:13,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674577501] [2021-11-13 17:52:13,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:13,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:13,792 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:13,883 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-13 17:52:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:52:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-13 17:52:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:13,885 INFO L225 Difference]: With dead ends: 55 [2021-11-13 17:52:13,885 INFO L226 Difference]: Without dead ends: 55 [2021-11-13 17:52:13,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:52:13,886 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:13,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 79 Invalid, 72 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 67.61ms Time] [2021-11-13 17:52:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-13 17:52:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-13 17:52:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 17:52:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-13 17:52:13,891 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2021-11-13 17:52:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:13,891 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-13 17:52:13,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-13 17:52:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:52:13,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:13,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:13,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:52:13,893 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2021-11-13 17:52:13,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:13,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592624213] [2021-11-13 17:52:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:13,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:14,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:14,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592624213] [2021-11-13 17:52:14,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592624213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:14,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:14,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 17:52:14,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171047751] [2021-11-13 17:52:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:14,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:52:14,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:52:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:52:14,078 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:14,458 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-11-13 17:52:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:52:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-13 17:52:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:14,460 INFO L225 Difference]: With dead ends: 81 [2021-11-13 17:52:14,460 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 17:52:14,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:52:14,462 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:14,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 173 Invalid, 429 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [16 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 222.63ms Time] [2021-11-13 17:52:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 17:52:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-11-13 17:52:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 61 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 17:52:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-11-13 17:52:14,467 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 24 [2021-11-13 17:52:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:14,468 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-11-13 17:52:14,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-11-13 17:52:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:52:14,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:14,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:14,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:52:14,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2021-11-13 17:52:14,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:14,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813532114] [2021-11-13 17:52:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:14,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:14,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:14,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813532114] [2021-11-13 17:52:14,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813532114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:14,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:14,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-13 17:52:14,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252260835] [2021-11-13 17:52:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:14,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:52:14,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:52:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:52:14,720 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:15,205 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-13 17:52:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:52:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-13 17:52:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:15,207 INFO L225 Difference]: With dead ends: 101 [2021-11-13 17:52:15,207 INFO L226 Difference]: Without dead ends: 101 [2021-11-13 17:52:15,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:52:15,208 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 290.18ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:15,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 158 Invalid, 484 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 290.18ms Time] [2021-11-13 17:52:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-13 17:52:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2021-11-13 17:52:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 62 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 17:52:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-11-13 17:52:15,214 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 24 [2021-11-13 17:52:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:15,214 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-11-13 17:52:15,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:52:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-11-13 17:52:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 17:52:15,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:15,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:15,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:52:15,216 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2021-11-13 17:52:15,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:15,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135012445] [2021-11-13 17:52:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:15,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:52:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:15,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:15,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135012445] [2021-11-13 17:52:15,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135012445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:15,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:15,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-13 17:52:15,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235726957] [2021-11-13 17:52:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:15,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:52:15,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:52:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:52:15,327 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:52:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:15,591 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-13 17:52:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:52:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-13 17:52:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:15,593 INFO L225 Difference]: With dead ends: 80 [2021-11-13 17:52:15,593 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 17:52:15,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:52:15,594 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.23ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:15,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 115 Invalid, 348 Unknown, 0 Unchecked, 3.23ms Time], IncrementalHoareTripleChecker [14 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 177.27ms Time] [2021-11-13 17:52:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 17:52:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-13 17:52:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 68 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-13 17:52:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-11-13 17:52:15,599 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2021-11-13 17:52:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:15,599 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-11-13 17:52:15,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:52:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-11-13 17:52:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 17:52:15,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:15,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:15,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:52:15,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2021-11-13 17:52:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:15,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335860345] [2021-11-13 17:52:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:15,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 17:52:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:52:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:15,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:15,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335860345] [2021-11-13 17:52:15,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335860345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:15,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:15,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:52:15,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382924626] [2021-11-13 17:52:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:52:15,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:52:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:52:15,825 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:52:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:16,154 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-11-13 17:52:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:52:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-13 17:52:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:16,156 INFO L225 Difference]: With dead ends: 88 [2021-11-13 17:52:16,156 INFO L226 Difference]: Without dead ends: 88 [2021-11-13 17:52:16,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:52:16,157 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 97 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.43ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:16,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 184 Invalid, 331 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 187.43ms Time] [2021-11-13 17:52:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-13 17:52:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-11-13 17:52:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.265625) internal successors, (81), 72 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 17:52:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-13 17:52:16,162 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2021-11-13 17:52:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:16,162 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-13 17:52:16,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:52:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-13 17:52:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 17:52:16,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:16,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:52:16,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-13 17:52:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2021-11-13 17:52:16,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:16,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481039183] [2021-11-13 17:52:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:16,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 17:52:16,178 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 17:52:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 17:52:16,206 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 17:52:16,207 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 17:52:16,208 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION (15 of 16 remaining) [2021-11-13 17:52:16,210 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-11-13 17:52:16,210 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-11-13 17:52:16,210 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-11-13 17:52:16,210 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-11-13 17:52:16,211 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-11-13 17:52:16,211 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrchrErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-11-13 17:52:16,211 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATION (8 of 16 remaining) [2021-11-13 17:52:16,211 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATION (7 of 16 remaining) [2021-11-13 17:52:16,211 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATION (6 of 16 remaining) [2021-11-13 17:52:16,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATION (5 of 16 remaining) [2021-11-13 17:52:16,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (4 of 16 remaining) [2021-11-13 17:52:16,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE (3 of 16 remaining) [2021-11-13 17:52:16,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE (2 of 16 remaining) [2021-11-13 17:52:16,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (1 of 16 remaining) [2021-11-13 17:52:16,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2021-11-13 17:52:16,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:52:16,216 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:16,220 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 17:52:16,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 05:52:16 BoogieIcfgContainer [2021-11-13 17:52:16,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 17:52:16,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 17:52:16,245 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 17:52:16,245 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 17:52:16,246 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:52:09" (3/4) ... [2021-11-13 17:52:16,248 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 17:52:16,282 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 17:52:16,282 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 17:52:16,282 INFO L158 Benchmark]: Toolchain (without parser) took 7819.90ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 60.2MB in the beginning and 59.0MB in the end (delta: 1.2MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,283 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 77.4MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:52:16,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 581.14ms. Allocated memory is still 102.8MB. Free memory was 60.0MB in the beginning and 71.8MB in the end (delta: -11.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,283 INFO L158 Benchmark]: Boogie Preprocessor took 95.25ms. Allocated memory is still 102.8MB. Free memory was 71.8MB in the beginning and 69.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,284 INFO L158 Benchmark]: RCFGBuilder took 674.27ms. Allocated memory is still 102.8MB. Free memory was 69.4MB in the beginning and 49.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,284 INFO L158 Benchmark]: TraceAbstraction took 6411.02ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 49.3MB in the beginning and 61.1MB in the end (delta: -11.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,285 INFO L158 Benchmark]: Witness Printer took 36.90ms. Allocated memory is still 123.7MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:52:16,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 77.4MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 581.14ms. Allocated memory is still 102.8MB. Free memory was 60.0MB in the beginning and 71.8MB in the end (delta: -11.9MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 95.25ms. Allocated memory is still 102.8MB. Free memory was 71.8MB in the beginning and 69.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 674.27ms. Allocated memory is still 102.8MB. Free memory was 69.4MB in the beginning and 49.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 6411.02ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 49.3MB in the beginning and 61.1MB in the end (delta: -11.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Witness Printer took 36.90ms. Allocated memory is still 123.7MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) VAL [\old(c)=2, s={-1:0}] [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=2, cstrchr(s,__VERIFIER_nondet_int())={0:0}, s={-1:0}] - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 843 SdHoareTripleChecker+Valid, 1986.78ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 833 mSDsluCounter, 1358 SdHoareTripleChecker+Invalid, 1622.75ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 900 mSDsCounter, 124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2661 IncrementalHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 124 mSolverCounterUnsat, 458 mSDtfsCounter, 2661 mSolverCounterSat, 55.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=13, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 71 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 1256 SizeOfPredicates, 1 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 15 InterpolantComputations, 12 PerfectInterpolantSequences, 4/9 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 RESULT: Ultimate proved your program to be incorrect! [2021-11-13 17:52:16,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9305b16-e3f5-4702-9be4-7e65e19ba44d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)