./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:33:43,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:33:43,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:33:43,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:33:43,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:33:43,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:33:43,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:33:43,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:33:43,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:33:43,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:33:43,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:33:43,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:33:43,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:33:43,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:33:43,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:33:43,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:33:43,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:33:43,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:33:43,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:33:43,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:33:43,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:33:43,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:33:43,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:33:43,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:33:43,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:33:43,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:33:43,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:33:43,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:33:43,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:33:43,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:33:43,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:33:43,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:33:43,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:33:43,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:33:43,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:33:43,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:33:43,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:33:43,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:33:43,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:33:43,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:33:43,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:33:43,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 05:33:43,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:33:43,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:33:43,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:33:43,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:33:43,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:33:43,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:33:43,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:33:43,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:33:43,385 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:33:43,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:33:43,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:33:43,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:33:43,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:33:43,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:33:43,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:33:43,388 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 05:33:43,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 05:33:43,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 05:33:43,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:33:43,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 05:33:43,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:33:43,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:33:43,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:33:43,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:33:43,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:33:43,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:43,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:33:43,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:33:43,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:33:43,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:33:43,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:33:43,393 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_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-11-19 05:33:43,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:33:43,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:33:43,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:33:43,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:33:43,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:33:43,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-19 05:33:43,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/1bff5960c/b669230531144a00a6683469776ec055/FLAGf356e1527 [2021-11-19 05:33:44,403 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:33:44,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-19 05:33:44,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/1bff5960c/b669230531144a00a6683469776ec055/FLAGf356e1527 [2021-11-19 05:33:44,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/1bff5960c/b669230531144a00a6683469776ec055 [2021-11-19 05:33:44,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:33:44,705 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 05:33:44,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:44,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:33:44,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:33:44,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:44" (1/1) ... [2021-11-19 05:33:44,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562d0b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:44, skipping insertion in model container [2021-11-19 05:33:44,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:44" (1/1) ... [2021-11-19 05:33:44,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:33:44,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:33:45,074 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:45,083 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:33:45,124 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:45,162 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:33:45,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45 WrapperNode [2021-11-19 05:33:45,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:45,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:33:45,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:33:45,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:33:45,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:33:45,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:33:45,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:33:45,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:33:45,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (1/1) ... [2021-11-19 05:33:45,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:45,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:33:45,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:33:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 05:33:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:33:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-11-19 05:33:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 05:33:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 05:33:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-19 05:33:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-11-19 05:33:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-11-19 05:33:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 05:33:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 05:33:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 05:33:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 05:33:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 05:33:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 05:33:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 05:33:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 05:33:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 05:33:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 05:33:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 05:33:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 05:33:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 05:33:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 05:33:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 05:33:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 05:33:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 05:33:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 05:33:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 05:33:45,347 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 05:33:45,348 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 05:33:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 05:33:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 05:33:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-19 05:33:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-19 05:33:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-19 05:33:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-19 05:33:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-19 05:33:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-19 05:33:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-19 05:33:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-19 05:33:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-19 05:33:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-19 05:33:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-19 05:33:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-11-19 05:33:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:33:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:33:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:33:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:33:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:33:45,760 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:33:45,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:33:45,966 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:33:45,974 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:33:45,974 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:33:45,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:45 BoogieIcfgContainer [2021-11-19 05:33:45,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:33:45,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:33:45,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:33:45,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:33:45,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:33:44" (1/3) ... [2021-11-19 05:33:45,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f0e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:45, skipping insertion in model container [2021-11-19 05:33:45,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:45" (2/3) ... [2021-11-19 05:33:45,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f0e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:45, skipping insertion in model container [2021-11-19 05:33:45,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:45" (3/3) ... [2021-11-19 05:33:45,985 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-11-19 05:33:45,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:33:45,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-11-19 05:33:46,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:33:46,042 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:33:46,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-11-19 05:33:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 65 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:33:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:33:46,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:46,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:46,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1891287210, now seen corresponding path program 1 times [2021-11-19 05:33:46,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:46,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144579610] [2021-11-19 05:33:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:46,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:46,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:46,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144579610] [2021-11-19 05:33:46,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144579610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:46,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:46,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:33:46,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945735669] [2021-11-19 05:33:46,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:46,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:33:46,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:33:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:33:46,407 INFO L87 Difference]: Start difference. First operand has 79 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 65 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:46,771 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-11-19 05:33:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:33:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-19 05:33:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:46,784 INFO L225 Difference]: With dead ends: 106 [2021-11-19 05:33:46,784 INFO L226 Difference]: Without dead ends: 97 [2021-11-19 05:33:46,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:46,789 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 115 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:46,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 74 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:33:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-19 05:33:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-11-19 05:33:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.58) internal successors, (79), 73 states have internal predecessors, (79), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-19 05:33:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2021-11-19 05:33:46,844 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 9 [2021-11-19 05:33:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:46,845 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2021-11-19 05:33:46,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2021-11-19 05:33:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:33:46,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:46,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:46,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:33:46,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1891287209, now seen corresponding path program 1 times [2021-11-19 05:33:46,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:46,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982905157] [2021-11-19 05:33:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:46,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:47,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:47,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982905157] [2021-11-19 05:33:47,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982905157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:47,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:47,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:47,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708224649] [2021-11-19 05:33:47,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:47,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:33:47,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:33:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:47,015 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:47,541 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2021-11-19 05:33:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:33:47,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-19 05:33:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:47,550 INFO L225 Difference]: With dead ends: 175 [2021-11-19 05:33:47,551 INFO L226 Difference]: Without dead ends: 175 [2021-11-19 05:33:47,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:47,553 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 172 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:47,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:33:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-19 05:33:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 144. [2021-11-19 05:33:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.6195652173913044) internal successors, (149), 115 states have internal predecessors, (149), 17 states have call successors, (17), 11 states have call predecessors, (17), 14 states have return successors, (47), 17 states have call predecessors, (47), 16 states have call successors, (47) [2021-11-19 05:33:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 213 transitions. [2021-11-19 05:33:47,594 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 213 transitions. Word has length 9 [2021-11-19 05:33:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:47,594 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 213 transitions. [2021-11-19 05:33:47,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 213 transitions. [2021-11-19 05:33:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 05:33:47,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:47,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:47,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:33:47,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1499638660, now seen corresponding path program 1 times [2021-11-19 05:33:47,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:47,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437405876] [2021-11-19 05:33:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:47,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:47,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:47,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:47,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437405876] [2021-11-19 05:33:47,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437405876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:47,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:47,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:33:47,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302664678] [2021-11-19 05:33:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:33:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:33:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:47,961 INFO L87 Difference]: Start difference. First operand 144 states and 213 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:48,736 INFO L93 Difference]: Finished difference Result 262 states and 378 transitions. [2021-11-19 05:33:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:33:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-19 05:33:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:48,740 INFO L225 Difference]: With dead ends: 262 [2021-11-19 05:33:48,741 INFO L226 Difference]: Without dead ends: 262 [2021-11-19 05:33:48,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:33:48,743 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 214 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:48,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 152 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:33:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-19 05:33:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-11-19 05:33:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 141 states have (on average 1.6170212765957446) internal successors, (228), 165 states have internal predecessors, (228), 21 states have call successors, (21), 16 states have call predecessors, (21), 19 states have return successors, (57), 20 states have call predecessors, (57), 20 states have call successors, (57) [2021-11-19 05:33:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 306 transitions. [2021-11-19 05:33:48,767 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 306 transitions. Word has length 10 [2021-11-19 05:33:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:48,767 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 306 transitions. [2021-11-19 05:33:48,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 306 transitions. [2021-11-19 05:33:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:33:48,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:48,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:48,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:33:48,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash -755841706, now seen corresponding path program 1 times [2021-11-19 05:33:48,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:48,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885088924] [2021-11-19 05:33:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:48,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:49,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885088924] [2021-11-19 05:33:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885088924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:49,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:33:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779126248] [2021-11-19 05:33:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:33:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:33:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:33:49,022 INFO L87 Difference]: Start difference. First operand 202 states and 306 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:49,538 INFO L93 Difference]: Finished difference Result 236 states and 332 transitions. [2021-11-19 05:33:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:33:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-19 05:33:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:49,540 INFO L225 Difference]: With dead ends: 236 [2021-11-19 05:33:49,540 INFO L226 Difference]: Without dead ends: 236 [2021-11-19 05:33:49,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:33:49,542 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 192 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:49,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 138 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:33:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-19 05:33:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 202. [2021-11-19 05:33:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 141 states have (on average 1.6028368794326242) internal successors, (226), 165 states have internal predecessors, (226), 21 states have call successors, (21), 16 states have call predecessors, (21), 19 states have return successors, (57), 20 states have call predecessors, (57), 20 states have call successors, (57) [2021-11-19 05:33:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 304 transitions. [2021-11-19 05:33:49,561 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 304 transitions. Word has length 11 [2021-11-19 05:33:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:49,561 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 304 transitions. [2021-11-19 05:33:49,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 304 transitions. [2021-11-19 05:33:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:33:49,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:49,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:49,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:33:49,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1956256314, now seen corresponding path program 1 times [2021-11-19 05:33:49,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:49,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278362765] [2021-11-19 05:33:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:49,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:49,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:49,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:49,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278362765] [2021-11-19 05:33:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278362765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:49,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:33:49,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895729450] [2021-11-19 05:33:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:49,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:33:49,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:33:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:49,808 INFO L87 Difference]: Start difference. First operand 202 states and 304 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:50,428 INFO L93 Difference]: Finished difference Result 290 states and 399 transitions. [2021-11-19 05:33:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:33:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-19 05:33:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:50,432 INFO L225 Difference]: With dead ends: 290 [2021-11-19 05:33:50,432 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 05:33:50,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:33:50,433 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 288 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:50,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 141 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:33:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 05:33:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 239. [2021-11-19 05:33:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 174 states have (on average 1.5747126436781609) internal successors, (274), 200 states have internal predecessors, (274), 22 states have call successors, (22), 17 states have call predecessors, (22), 22 states have return successors, (61), 21 states have call predecessors, (61), 21 states have call successors, (61) [2021-11-19 05:33:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 357 transitions. [2021-11-19 05:33:50,448 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 357 transitions. Word has length 12 [2021-11-19 05:33:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:50,449 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 357 transitions. [2021-11-19 05:33:50,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 357 transitions. [2021-11-19 05:33:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:33:50,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:50,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:50,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:33:50,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash -514403496, now seen corresponding path program 1 times [2021-11-19 05:33:50,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:50,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225717783] [2021-11-19 05:33:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:50,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:50,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:50,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225717783] [2021-11-19 05:33:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225717783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:50,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:50,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:33:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535897720] [2021-11-19 05:33:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:50,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:33:50,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:33:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:33:50,566 INFO L87 Difference]: Start difference. First operand 239 states and 357 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:51,004 INFO L93 Difference]: Finished difference Result 271 states and 367 transitions. [2021-11-19 05:33:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:33:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 05:33:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:51,007 INFO L225 Difference]: With dead ends: 271 [2021-11-19 05:33:51,007 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 05:33:51,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:33:51,009 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 220 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 135 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:33:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 05:33:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2021-11-19 05:33:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 176 states have (on average 1.5568181818181819) internal successors, (274), 202 states have internal predecessors, (274), 22 states have call successors, (22), 17 states have call predecessors, (22), 23 states have return successors, (61), 22 states have call predecessors, (61), 21 states have call successors, (61) [2021-11-19 05:33:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2021-11-19 05:33:51,033 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 13 [2021-11-19 05:33:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:51,033 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2021-11-19 05:33:51,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2021-11-19 05:33:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:33:51,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:51,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:51,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:33:51,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -389968098, now seen corresponding path program 1 times [2021-11-19 05:33:51,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:51,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555743130] [2021-11-19 05:33:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:51,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:51,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:51,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:51,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555743130] [2021-11-19 05:33:51,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555743130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:51,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345158175] [2021-11-19 05:33:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:51,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:51,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:51,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:33:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:33:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:51,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:33:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:51,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345158175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:51,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:51,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2021-11-19 05:33:51,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697083429] [2021-11-19 05:33:51,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:51,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:33:51,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:33:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:33:51,845 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:52,494 INFO L93 Difference]: Finished difference Result 280 states and 386 transitions. [2021-11-19 05:33:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:33:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-19 05:33:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:52,497 INFO L225 Difference]: With dead ends: 280 [2021-11-19 05:33:52,498 INFO L226 Difference]: Without dead ends: 280 [2021-11-19 05:33:52,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:33:52,499 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 234 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:52,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 221 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:33:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-19 05:33:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 245. [2021-11-19 05:33:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.4972067039106145) internal successors, (268), 205 states have internal predecessors, (268), 22 states have call successors, (22), 17 states have call predecessors, (22), 23 states have return successors, (61), 22 states have call predecessors, (61), 21 states have call successors, (61) [2021-11-19 05:33:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 351 transitions. [2021-11-19 05:33:52,512 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 351 transitions. Word has length 17 [2021-11-19 05:33:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:52,512 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 351 transitions. [2021-11-19 05:33:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 351 transitions. [2021-11-19 05:33:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:33:52,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:52,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:52,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:52,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:33:52,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 795890845, now seen corresponding path program 1 times [2021-11-19 05:33:52,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:52,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125329902] [2021-11-19 05:33:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:52,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:53,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:53,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125329902] [2021-11-19 05:33:53,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125329902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:53,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224566327] [2021-11-19 05:33:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:53,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:53,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:53,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:33:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:33:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:53,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:33:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 05:33:53,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-19 05:33:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:53,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224566327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:53,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:53,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2021-11-19 05:33:53,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420939089] [2021-11-19 05:33:53,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:53,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:33:53,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:33:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:33:53,688 INFO L87 Difference]: Start difference. First operand 245 states and 351 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:33:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:54,611 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2021-11-19 05:33:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:33:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2021-11-19 05:33:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:54,614 INFO L225 Difference]: With dead ends: 307 [2021-11-19 05:33:54,614 INFO L226 Difference]: Without dead ends: 307 [2021-11-19 05:33:54,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:33:54,616 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 372 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:54,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 225 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:33:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-19 05:33:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 251. [2021-11-19 05:33:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 185 states have (on average 1.4864864864864864) internal successors, (275), 211 states have internal predecessors, (275), 22 states have call successors, (22), 17 states have call predecessors, (22), 23 states have return successors, (61), 22 states have call predecessors, (61), 21 states have call successors, (61) [2021-11-19 05:33:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 358 transitions. [2021-11-19 05:33:54,637 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 358 transitions. Word has length 18 [2021-11-19 05:33:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:54,638 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 358 transitions. [2021-11-19 05:33:54,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:33:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 358 transitions. [2021-11-19 05:33:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 05:33:54,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:54,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:54,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:54,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:33:54,867 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1097187491, now seen corresponding path program 1 times [2021-11-19 05:33:54,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:54,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612315221] [2021-11-19 05:33:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:54,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:55,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:55,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612315221] [2021-11-19 05:33:55,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612315221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:55,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496143304] [2021-11-19 05:33:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:55,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:55,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:55,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:33:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 05:33:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:55,290 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:33:55,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-19 05:33:55,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:33:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 05:33:55,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-11-19 05:33:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-19 05:33:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:55,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496143304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:56,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:56,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-11-19 05:33:56,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836136545] [2021-11-19 05:33:56,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:56,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:33:56,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:33:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:33:56,127 INFO L87 Difference]: Start difference. First operand 251 states and 358 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:33:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:58,140 INFO L93 Difference]: Finished difference Result 475 states and 653 transitions. [2021-11-19 05:33:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 05:33:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2021-11-19 05:33:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:58,145 INFO L225 Difference]: With dead ends: 475 [2021-11-19 05:33:58,145 INFO L226 Difference]: Without dead ends: 475 [2021-11-19 05:33:58,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 05:33:58,147 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 555 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:58,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 368 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1118 Invalid, 0 Unknown, 19 Unchecked, 1.1s Time] [2021-11-19 05:33:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-19 05:33:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 373. [2021-11-19 05:33:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 284 states have (on average 1.5140845070422535) internal successors, (430), 315 states have internal predecessors, (430), 30 states have call successors, (30), 25 states have call predecessors, (30), 38 states have return successors, (88), 32 states have call predecessors, (88), 29 states have call successors, (88) [2021-11-19 05:33:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 548 transitions. [2021-11-19 05:33:58,172 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 548 transitions. Word has length 19 [2021-11-19 05:33:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:58,173 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 548 transitions. [2021-11-19 05:33:58,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:33:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 548 transitions. [2021-11-19 05:33:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:33:58,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:58,174 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] [2021-11-19 05:33:58,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:58,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:58,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash -321978897, now seen corresponding path program 1 times [2021-11-19 05:33:58,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:58,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113945020] [2021-11-19 05:33:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:58,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:58,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:58,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:58,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113945020] [2021-11-19 05:33:58,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113945020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:58,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:33:58,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496135779] [2021-11-19 05:33:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:58,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:33:58,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:33:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:33:58,464 INFO L87 Difference]: Start difference. First operand 373 states and 548 transitions. Second operand has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:58,689 INFO L93 Difference]: Finished difference Result 549 states and 821 transitions. [2021-11-19 05:33:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:33:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-19 05:33:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:58,695 INFO L225 Difference]: With dead ends: 549 [2021-11-19 05:33:58,695 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 05:33:58,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:58,696 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 133 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:58,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 77 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:33:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 05:33:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 533. [2021-11-19 05:33:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 412 states have (on average 1.516990291262136) internal successors, (625), 447 states have internal predecessors, (625), 42 states have call successors, (42), 36 states have call predecessors, (42), 58 states have return successors, (149), 49 states have call predecessors, (149), 41 states have call successors, (149) [2021-11-19 05:33:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 816 transitions. [2021-11-19 05:33:58,731 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 816 transitions. Word has length 23 [2021-11-19 05:33:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 816 transitions. [2021-11-19 05:33:58,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 816 transitions. [2021-11-19 05:33:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:33:58,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:58,733 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] [2021-11-19 05:33:58,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:33:58,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting c2Err3ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -321978673, now seen corresponding path program 1 times [2021-11-19 05:33:58,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:58,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999943405] [2021-11-19 05:33:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:58,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:58,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999943405] [2021-11-19 05:33:58,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999943405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:58,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:58,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:58,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737215109] [2021-11-19 05:33:58,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:33:58,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:33:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:33:58,830 INFO L87 Difference]: Start difference. First operand 533 states and 816 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:59,029 INFO L93 Difference]: Finished difference Result 579 states and 830 transitions. [2021-11-19 05:33:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:33:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-19 05:33:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:59,034 INFO L225 Difference]: With dead ends: 579 [2021-11-19 05:33:59,034 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 05:33:59,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:59,035 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:59,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 77 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:33:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 05:33:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 555. [2021-11-19 05:33:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 432 states have (on average 1.5046296296296295) internal successors, (650), 465 states have internal predecessors, (650), 43 states have call successors, (43), 38 states have call predecessors, (43), 59 states have return successors, (122), 51 states have call predecessors, (122), 42 states have call successors, (122) [2021-11-19 05:33:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 815 transitions. [2021-11-19 05:33:59,062 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 815 transitions. Word has length 23 [2021-11-19 05:33:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:59,063 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 815 transitions. [2021-11-19 05:33:59,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 815 transitions. [2021-11-19 05:33:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 05:33:59,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:59,064 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] [2021-11-19 05:33:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:33:59,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting c2Err1ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1391411157, now seen corresponding path program 1 times [2021-11-19 05:33:59,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:59,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058028567] [2021-11-19 05:33:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:59,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:59,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:59,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058028567] [2021-11-19 05:33:59,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058028567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:59,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:59,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:33:59,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118964584] [2021-11-19 05:33:59,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:59,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:33:59,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:33:59,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:33:59,138 INFO L87 Difference]: Start difference. First operand 555 states and 815 transitions. Second operand has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:59,381 INFO L93 Difference]: Finished difference Result 574 states and 823 transitions. [2021-11-19 05:33:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:33:59,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-19 05:33:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:59,386 INFO L225 Difference]: With dead ends: 574 [2021-11-19 05:33:59,386 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 05:33:59,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:59,387 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 104 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:59,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 71 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:33:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 05:33:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 555. [2021-11-19 05:33:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 432 states have (on average 1.4976851851851851) internal successors, (647), 465 states have internal predecessors, (647), 43 states have call successors, (43), 38 states have call predecessors, (43), 59 states have return successors, (122), 51 states have call predecessors, (122), 42 states have call successors, (122) [2021-11-19 05:33:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 812 transitions. [2021-11-19 05:33:59,413 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 812 transitions. Word has length 24 [2021-11-19 05:33:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:59,413 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 812 transitions. [2021-11-19 05:33:59,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 812 transitions. [2021-11-19 05:33:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:33:59,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:59,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:59,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 05:33:59,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1350782223, now seen corresponding path program 1 times [2021-11-19 05:33:59,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:59,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728204456] [2021-11-19 05:33:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:59,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:33:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:33:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:59,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:59,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728204456] [2021-11-19 05:33:59,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728204456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:59,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:59,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:33:59,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651660481] [2021-11-19 05:33:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:33:59,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:33:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:59,518 INFO L87 Difference]: Start difference. First operand 555 states and 812 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:33:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:59,721 INFO L93 Difference]: Finished difference Result 390 states and 559 transitions. [2021-11-19 05:33:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:33:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-19 05:33:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:59,725 INFO L225 Difference]: With dead ends: 390 [2021-11-19 05:33:59,725 INFO L226 Difference]: Without dead ends: 390 [2021-11-19 05:33:59,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:59,726 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:59,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:33:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-19 05:33:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-19 05:33:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 303 states have (on average 1.495049504950495) internal successors, (453), 331 states have internal predecessors, (453), 31 states have call successors, (31), 27 states have call predecessors, (31), 35 states have return successors, (75), 31 states have call predecessors, (75), 30 states have call successors, (75) [2021-11-19 05:33:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 559 transitions. [2021-11-19 05:33:59,743 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 559 transitions. Word has length 33 [2021-11-19 05:33:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:59,744 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 559 transitions. [2021-11-19 05:33:59,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:33:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 559 transitions. [2021-11-19 05:33:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:33:59,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:59,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:59,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 05:33:59,746 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:33:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1784623764, now seen corresponding path program 1 times [2021-11-19 05:33:59,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:59,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145359577] [2021-11-19 05:33:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:59,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:33:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:33:59,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:59,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145359577] [2021-11-19 05:33:59,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145359577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:59,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549616658] [2021-11-19 05:33:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:59,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:59,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:59,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:34:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:34:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:00,085 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:34:00,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 05:34:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:00,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:00,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549616658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:00,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:00,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2021-11-19 05:34:00,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537953888] [2021-11-19 05:34:00,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:00,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:34:00,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:34:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:34:00,535 INFO L87 Difference]: Start difference. First operand 390 states and 559 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:34:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:01,281 INFO L93 Difference]: Finished difference Result 554 states and 763 transitions. [2021-11-19 05:34:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:34:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2021-11-19 05:34:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:01,285 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:34:01,286 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 05:34:01,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:34:01,287 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 414 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:01,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 410 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 603 Invalid, 0 Unknown, 351 Unchecked, 0.5s Time] [2021-11-19 05:34:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 05:34:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 479. [2021-11-19 05:34:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 383 states have (on average 1.485639686684073) internal successors, (569), 411 states have internal predecessors, (569), 35 states have call successors, (35), 32 states have call predecessors, (35), 40 states have return successors, (86), 35 states have call predecessors, (86), 34 states have call successors, (86) [2021-11-19 05:34:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 690 transitions. [2021-11-19 05:34:01,309 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 690 transitions. Word has length 33 [2021-11-19 05:34:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 690 transitions. [2021-11-19 05:34:01,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:34:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 690 transitions. [2021-11-19 05:34:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 05:34:01,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:01,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:01,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 05:34:01,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2094620526, now seen corresponding path program 1 times [2021-11-19 05:34:01,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:01,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192075063] [2021-11-19 05:34:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:01,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:01,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:01,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192075063] [2021-11-19 05:34:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192075063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:01,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150091648] [2021-11-19 05:34:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:01,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:01,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:01,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:01,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:34:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:34:02,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:02,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:02,381 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:02,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:02,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:02,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150091648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:02,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-19 05:34:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613572225] [2021-11-19 05:34:02,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:34:02,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:34:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:34:02,632 INFO L87 Difference]: Start difference. First operand 479 states and 690 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:03,654 INFO L93 Difference]: Finished difference Result 595 states and 803 transitions. [2021-11-19 05:34:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:34:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2021-11-19 05:34:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:03,659 INFO L225 Difference]: With dead ends: 595 [2021-11-19 05:34:03,659 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 05:34:03,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:34:03,660 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 405 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:03,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 298 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 593 Invalid, 0 Unknown, 377 Unchecked, 0.6s Time] [2021-11-19 05:34:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 05:34:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 503. [2021-11-19 05:34:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 400 states have (on average 1.475) internal successors, (590), 429 states have internal predecessors, (590), 36 states have call successors, (36), 34 states have call predecessors, (36), 46 states have return successors, (88), 39 states have call predecessors, (88), 35 states have call successors, (88) [2021-11-19 05:34:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 714 transitions. [2021-11-19 05:34:03,683 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 714 transitions. Word has length 35 [2021-11-19 05:34:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 714 transitions. [2021-11-19 05:34:03,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 714 transitions. [2021-11-19 05:34:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 05:34:03,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:03,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:03,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:03,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 05:34:03,907 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -511238070, now seen corresponding path program 1 times [2021-11-19 05:34:03,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:03,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136538253] [2021-11-19 05:34:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:03,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:04,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:04,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:04,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136538253] [2021-11-19 05:34:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136538253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:04,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945716630] [2021-11-19 05:34:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:04,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:04,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:04,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:04,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:34:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:34:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:04,238 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:04,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:04,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:34:04,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-19 05:34:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:04,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945716630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:04,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:04,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2021-11-19 05:34:04,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257925601] [2021-11-19 05:34:04,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:04,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:34:04,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:34:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:34:04,800 INFO L87 Difference]: Start difference. First operand 503 states and 714 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:34:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:05,216 INFO L93 Difference]: Finished difference Result 549 states and 759 transitions. [2021-11-19 05:34:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:34:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-11-19 05:34:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:05,221 INFO L225 Difference]: With dead ends: 549 [2021-11-19 05:34:05,221 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 05:34:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:34:05,222 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 164 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:05,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 312 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 270 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2021-11-19 05:34:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 05:34:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 534. [2021-11-19 05:34:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 427 states have (on average 1.4637002341920375) internal successors, (625), 458 states have internal predecessors, (625), 38 states have call successors, (38), 35 states have call predecessors, (38), 48 states have return successors, (92), 40 states have call predecessors, (92), 37 states have call successors, (92) [2021-11-19 05:34:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 755 transitions. [2021-11-19 05:34:05,241 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 755 transitions. Word has length 34 [2021-11-19 05:34:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:05,241 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 755 transitions. [2021-11-19 05:34:05,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:34:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 755 transitions. [2021-11-19 05:34:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 05:34:05,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:05,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:05,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 05:34:05,467 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1323788447, now seen corresponding path program 1 times [2021-11-19 05:34:05,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:05,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113741115] [2021-11-19 05:34:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:05,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:05,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:05,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113741115] [2021-11-19 05:34:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113741115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:05,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130437400] [2021-11-19 05:34:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:05,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:05,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:05,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:34:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:34:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:06,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:06,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130437400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:06,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:06,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2021-11-19 05:34:06,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392929427] [2021-11-19 05:34:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:06,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:34:06,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:34:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:34:06,119 INFO L87 Difference]: Start difference. First operand 534 states and 755 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:34:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:06,235 INFO L93 Difference]: Finished difference Result 601 states and 857 transitions. [2021-11-19 05:34:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:34:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-19 05:34:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:06,240 INFO L225 Difference]: With dead ends: 601 [2021-11-19 05:34:06,240 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 05:34:06,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:34:06,241 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 88 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:06,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 247 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:34:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 05:34:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 562. [2021-11-19 05:34:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 445 states have (on average 1.4696629213483146) internal successors, (654), 486 states have internal predecessors, (654), 48 states have call successors, (48), 35 states have call predecessors, (48), 48 states have return successors, (109), 40 states have call predecessors, (109), 47 states have call successors, (109) [2021-11-19 05:34:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 811 transitions. [2021-11-19 05:34:06,265 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 811 transitions. Word has length 36 [2021-11-19 05:34:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:06,265 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 811 transitions. [2021-11-19 05:34:06,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:34:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 811 transitions. [2021-11-19 05:34:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:34:06,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:06,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:06,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:06,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 05:34:06,491 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1409336403, now seen corresponding path program 1 times [2021-11-19 05:34:06,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:06,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742370800] [2021-11-19 05:34:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:06,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:06,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:06,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:07,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:07,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742370800] [2021-11-19 05:34:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742370800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:07,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083107073] [2021-11-19 05:34:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:07,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:07,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:07,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:34:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:07,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:34:07,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:07,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 05:34:07,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:34:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-19 05:34:08,082 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 05:34:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-19 05:34:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:08,208 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-11-19 05:34:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2021-11-19 05:34:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2021-11-19 05:34:08,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-19 05:34:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:08,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:08,816 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-19 05:34:08,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-11-19 05:34:09,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083107073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:09,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:09,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-11-19 05:34:09,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101052802] [2021-11-19 05:34:09,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:09,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 05:34:09,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 05:34:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:34:09,049 INFO L87 Difference]: Start difference. First operand 562 states and 811 transitions. Second operand has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 05:34:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:12,103 INFO L93 Difference]: Finished difference Result 616 states and 849 transitions. [2021-11-19 05:34:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:34:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2021-11-19 05:34:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:12,108 INFO L225 Difference]: With dead ends: 616 [2021-11-19 05:34:12,108 INFO L226 Difference]: Without dead ends: 616 [2021-11-19 05:34:12,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=812, Invalid=3744, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 05:34:12,110 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 939 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:12,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 300 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 943 Invalid, 0 Unknown, 277 Unchecked, 0.9s Time] [2021-11-19 05:34:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-19 05:34:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 563. [2021-11-19 05:34:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 446 states have (on average 1.4663677130044843) internal successors, (654), 487 states have internal predecessors, (654), 48 states have call successors, (48), 35 states have call predecessors, (48), 48 states have return successors, (109), 40 states have call predecessors, (109), 47 states have call successors, (109) [2021-11-19 05:34:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 811 transitions. [2021-11-19 05:34:12,132 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 811 transitions. Word has length 37 [2021-11-19 05:34:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 811 transitions. [2021-11-19 05:34:12,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 05:34:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 811 transitions. [2021-11-19 05:34:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:34:12,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:12,136 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:12,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 05:34:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 05:34:12,351 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -35675334, now seen corresponding path program 1 times [2021-11-19 05:34:12,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:12,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590532079] [2021-11-19 05:34:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:12,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 05:34:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:34:12,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:12,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590532079] [2021-11-19 05:34:12,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590532079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:12,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826167976] [2021-11-19 05:34:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:12,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:12,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:12,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:34:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 05:34:12,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:12,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:13,159 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:13,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2021-11-19 05:34:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:34:13,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:13,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826167976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:13,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:13,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2021-11-19 05:34:13,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208502822] [2021-11-19 05:34:13,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:13,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:34:13,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:13,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:34:13,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:34:13,339 INFO L87 Difference]: Start difference. First operand 563 states and 811 transitions. Second operand has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:14,024 INFO L93 Difference]: Finished difference Result 606 states and 853 transitions. [2021-11-19 05:34:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:34:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2021-11-19 05:34:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:14,029 INFO L225 Difference]: With dead ends: 606 [2021-11-19 05:34:14,029 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 05:34:14,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:34:14,030 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 344 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:14,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 251 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 639 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2021-11-19 05:34:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 05:34:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 577. [2021-11-19 05:34:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 456 states have (on average 1.4517543859649122) internal successors, (662), 497 states have internal predecessors, (662), 49 states have call successors, (49), 36 states have call predecessors, (49), 51 states have return successors, (108), 43 states have call predecessors, (108), 48 states have call successors, (108) [2021-11-19 05:34:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 819 transitions. [2021-11-19 05:34:14,052 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 819 transitions. Word has length 44 [2021-11-19 05:34:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 819 transitions. [2021-11-19 05:34:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 819 transitions. [2021-11-19 05:34:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:34:14,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:14,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:14,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:14,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:14,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1105935328, now seen corresponding path program 1 times [2021-11-19 05:34:14,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:14,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706172915] [2021-11-19 05:34:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:14,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 05:34:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:14,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:14,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706172915] [2021-11-19 05:34:14,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706172915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:14,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496482972] [2021-11-19 05:34:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:14,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:14,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:34:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:34:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-19 05:34:15,495 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-19 05:34:15,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-19 05:34:15,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-19 05:34:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:34:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:15,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-19 05:34:16,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496482972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:16,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:16,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-19 05:34:16,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291025574] [2021-11-19 05:34:16,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:16,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 05:34:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 05:34:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-11-19 05:34:16,113 INFO L87 Difference]: Start difference. First operand 577 states and 819 transitions. Second operand has 26 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (12), 11 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:18,230 INFO L93 Difference]: Finished difference Result 605 states and 813 transitions. [2021-11-19 05:34:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:34:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (12), 11 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 45 [2021-11-19 05:34:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:18,234 INFO L225 Difference]: With dead ends: 605 [2021-11-19 05:34:18,235 INFO L226 Difference]: Without dead ends: 587 [2021-11-19 05:34:18,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=2074, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 05:34:18,236 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 446 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:18,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 704 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1830 Invalid, 0 Unknown, 216 Unchecked, 1.1s Time] [2021-11-19 05:34:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-19 05:34:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 511. [2021-11-19 05:34:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 401 states have (on average 1.4663341645885286) internal successors, (588), 435 states have internal predecessors, (588), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 711 transitions. [2021-11-19 05:34:18,258 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 711 transitions. Word has length 45 [2021-11-19 05:34:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 711 transitions. [2021-11-19 05:34:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 21 states have internal predecessors, (67), 8 states have call successors, (12), 11 states have call predecessors, (12), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 711 transitions. [2021-11-19 05:34:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:34:18,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:18,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:18,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:18,475 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -577053613, now seen corresponding path program 1 times [2021-11-19 05:34:18,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:18,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947515757] [2021-11-19 05:34:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:18,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:18,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:18,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947515757] [2021-11-19 05:34:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947515757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:18,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648218209] [2021-11-19 05:34:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:18,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:18,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:18,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:34:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 05:34:18,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:18,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:18,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:19,208 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:19,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:19,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:19,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:19,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648218209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:19,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:19,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-11-19 05:34:19,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504888592] [2021-11-19 05:34:19,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:19,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:34:19,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:34:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:34:19,740 INFO L87 Difference]: Start difference. First operand 511 states and 711 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:20,350 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2021-11-19 05:34:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:34:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2021-11-19 05:34:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:20,356 INFO L225 Difference]: With dead ends: 523 [2021-11-19 05:34:20,356 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 05:34:20,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-11-19 05:34:20,357 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 333 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:20,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 312 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 530 Invalid, 0 Unknown, 387 Unchecked, 0.4s Time] [2021-11-19 05:34:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 05:34:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 511. [2021-11-19 05:34:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 401 states have (on average 1.4638403990024937) internal successors, (587), 435 states have internal predecessors, (587), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 710 transitions. [2021-11-19 05:34:20,378 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 710 transitions. Word has length 41 [2021-11-19 05:34:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:20,378 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 710 transitions. [2021-11-19 05:34:20,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 710 transitions. [2021-11-19 05:34:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:34:20,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:20,380 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:20,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:20,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 05:34:20,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -497309643, now seen corresponding path program 1 times [2021-11-19 05:34:20,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:20,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428620228] [2021-11-19 05:34:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:20,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:20,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:20,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:20,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:20,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:20,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428620228] [2021-11-19 05:34:20,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428620228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:20,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527135244] [2021-11-19 05:34:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:20,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:20,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:20,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:34:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 05:34:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:21,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:21,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:21,420 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:21,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:21,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:21,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:21,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527135244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:21,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:21,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2021-11-19 05:34:21,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77660865] [2021-11-19 05:34:21,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:21,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:34:21,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:34:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:21,859 INFO L87 Difference]: Start difference. First operand 511 states and 710 transitions. Second operand has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:22,585 INFO L93 Difference]: Finished difference Result 557 states and 752 transitions. [2021-11-19 05:34:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:34:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2021-11-19 05:34:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:22,593 INFO L225 Difference]: With dead ends: 557 [2021-11-19 05:34:22,594 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 05:34:22,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:34:22,595 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 429 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:22,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 318 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 618 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2021-11-19 05:34:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 05:34:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 514. [2021-11-19 05:34:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 404 states have (on average 1.4603960396039604) internal successors, (590), 438 states have internal predecessors, (590), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 713 transitions. [2021-11-19 05:34:22,613 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 713 transitions. Word has length 43 [2021-11-19 05:34:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:22,614 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 713 transitions. [2021-11-19 05:34:22,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 713 transitions. [2021-11-19 05:34:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:34:22,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:22,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:22,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:22,829 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr9REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash -497740492, now seen corresponding path program 1 times [2021-11-19 05:34:22,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:22,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702640385] [2021-11-19 05:34:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:22,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:22,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:22,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:22,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:22,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702640385] [2021-11-19 05:34:22,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702640385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:22,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894802249] [2021-11-19 05:34:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:22,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:22,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:22,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:34:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:34:23,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894802249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:23,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:23,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-19 05:34:23,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753730587] [2021-11-19 05:34:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:34:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:34:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:34:23,189 INFO L87 Difference]: Start difference. First operand 514 states and 713 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:23,230 INFO L93 Difference]: Finished difference Result 529 states and 717 transitions. [2021-11-19 05:34:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:34:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-11-19 05:34:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:23,234 INFO L225 Difference]: With dead ends: 529 [2021-11-19 05:34:23,234 INFO L226 Difference]: Without dead ends: 529 [2021-11-19 05:34:23,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:34:23,235 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 15 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:23,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 182 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-19 05:34:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2021-11-19 05:34:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 404 states have (on average 1.433168316831683) internal successors, (579), 437 states have internal predecessors, (579), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 702 transitions. [2021-11-19 05:34:23,254 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 702 transitions. Word has length 43 [2021-11-19 05:34:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 702 transitions. [2021-11-19 05:34:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 702 transitions. [2021-11-19 05:34:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 05:34:23,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:23,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:23,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:23,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 05:34:23,483 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash -891477359, now seen corresponding path program 2 times [2021-11-19 05:34:23,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:23,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072400044] [2021-11-19 05:34:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:23,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:23,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:23,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:23,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072400044] [2021-11-19 05:34:23,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072400044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:23,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117155035] [2021-11-19 05:34:23,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:34:23,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:23,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:23,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:34:23,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:34:23,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 05:34:23,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:23,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117155035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:23,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:23,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-11-19 05:34:23,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994273942] [2021-11-19 05:34:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:23,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:34:23,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:34:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:23,815 INFO L87 Difference]: Start difference. First operand 513 states and 702 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:34:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:23,846 INFO L93 Difference]: Finished difference Result 518 states and 696 transitions. [2021-11-19 05:34:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:34:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-19 05:34:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:23,858 INFO L225 Difference]: With dead ends: 518 [2021-11-19 05:34:23,858 INFO L226 Difference]: Without dead ends: 508 [2021-11-19 05:34:23,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:23,859 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:23,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-19 05:34:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 503. [2021-11-19 05:34:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 394 states have (on average 1.416243654822335) internal successors, (558), 427 states have internal predecessors, (558), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 681 transitions. [2021-11-19 05:34:23,876 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 681 transitions. Word has length 42 [2021-11-19 05:34:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:23,876 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 681 transitions. [2021-11-19 05:34:23,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:34:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 681 transitions. [2021-11-19 05:34:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:34:23,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:23,877 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:23,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 05:34:24,099 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1587055784, now seen corresponding path program 1 times [2021-11-19 05:34:24,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:24,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35291269] [2021-11-19 05:34:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:24,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:24,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:24,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35291269] [2021-11-19 05:34:24,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35291269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:24,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043404314] [2021-11-19 05:34:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:24,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:24,403 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:24,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:34:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 05:34:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:24,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:24,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:24,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:24,884 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:24,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:24,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:25,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043404314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:25,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:25,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2021-11-19 05:34:25,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976650851] [2021-11-19 05:34:25,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:25,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:34:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:34:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:25,366 INFO L87 Difference]: Start difference. First operand 503 states and 681 transitions. Second operand has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:26,078 INFO L93 Difference]: Finished difference Result 540 states and 716 transitions. [2021-11-19 05:34:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:34:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 45 [2021-11-19 05:34:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:26,082 INFO L225 Difference]: With dead ends: 540 [2021-11-19 05:34:26,082 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 05:34:26,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:34:26,083 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 424 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:26,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 410 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 636 Invalid, 0 Unknown, 298 Unchecked, 0.4s Time] [2021-11-19 05:34:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 05:34:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-11-19 05:34:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 391 states have (on average 1.4168797953964194) internal successors, (554), 424 states have internal predecessors, (554), 40 states have call successors, (40), 39 states have call predecessors, (40), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 677 transitions. [2021-11-19 05:34:26,100 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 677 transitions. Word has length 45 [2021-11-19 05:34:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:26,100 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 677 transitions. [2021-11-19 05:34:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 7 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:34:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 677 transitions. [2021-11-19 05:34:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 05:34:26,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:26,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:26,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 05:34:26,315 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash 123840966, now seen corresponding path program 1 times [2021-11-19 05:34:26,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:26,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004852550] [2021-11-19 05:34:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:26,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:26,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:26,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004852550] [2021-11-19 05:34:26,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004852550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:26,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51729136] [2021-11-19 05:34:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:26,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:26,435 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:26,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:34:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:34:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 05:34:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:26,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:34:27,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:34:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:27,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51729136] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:27,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:27,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2021-11-19 05:34:27,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247969814] [2021-11-19 05:34:27,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:27,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:34:27,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:34:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:34:27,011 INFO L87 Difference]: Start difference. First operand 500 states and 677 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:34:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:27,122 INFO L93 Difference]: Finished difference Result 503 states and 665 transitions. [2021-11-19 05:34:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:34:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-11-19 05:34:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:27,125 INFO L225 Difference]: With dead ends: 503 [2021-11-19 05:34:27,126 INFO L226 Difference]: Without dead ends: 503 [2021-11-19 05:34:27,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:34:27,126 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 104 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:27,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 278 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:34:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-19 05:34:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 480. [2021-11-19 05:34:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 373 states have (on average 1.3914209115281502) internal successors, (519), 406 states have internal predecessors, (519), 38 states have call successors, (38), 37 states have call predecessors, (38), 49 states have return successors, (83), 36 states have call predecessors, (83), 37 states have call successors, (83) [2021-11-19 05:34:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 640 transitions. [2021-11-19 05:34:27,144 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 640 transitions. Word has length 49 [2021-11-19 05:34:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:27,144 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 640 transitions. [2021-11-19 05:34:27,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:34:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 640 transitions. [2021-11-19 05:34:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 05:34:27,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:27,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:27,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:27,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 05:34:27,359 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting c1Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -368746668, now seen corresponding path program 1 times [2021-11-19 05:34:27,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:27,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926775332] [2021-11-19 05:34:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:27,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:27,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:27,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926775332] [2021-11-19 05:34:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926775332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:27,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837438378] [2021-11-19 05:34:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:27,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:27,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:27,470 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:27,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 05:34:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:34:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:27,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837438378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:27,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:27,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-11-19 05:34:27,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431878719] [2021-11-19 05:34:27,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:27,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:34:27,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:34:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:27,902 INFO L87 Difference]: Start difference. First operand 480 states and 640 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:28,067 INFO L93 Difference]: Finished difference Result 479 states and 634 transitions. [2021-11-19 05:34:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:34:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-11-19 05:34:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:28,071 INFO L225 Difference]: With dead ends: 479 [2021-11-19 05:34:28,071 INFO L226 Difference]: Without dead ends: 479 [2021-11-19 05:34:28,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:28,073 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 128 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:28,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 70 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:34:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-19 05:34:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 456. [2021-11-19 05:34:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 356 states have (on average 1.3707865168539326) internal successors, (488), 386 states have internal predecessors, (488), 34 states have call successors, (34), 33 states have call predecessors, (34), 49 states have return successors, (76), 36 states have call predecessors, (76), 33 states have call successors, (76) [2021-11-19 05:34:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2021-11-19 05:34:28,095 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 50 [2021-11-19 05:34:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:28,095 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2021-11-19 05:34:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2021-11-19 05:34:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 05:34:28,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:28,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:28,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:28,323 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2034185178, now seen corresponding path program 1 times [2021-11-19 05:34:28,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:28,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214204803] [2021-11-19 05:34:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:28,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:28,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:28,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214204803] [2021-11-19 05:34:28,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214204803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:28,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984073366] [2021-11-19 05:34:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:28,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:28,587 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:28,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 05:34:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:34:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:28,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:28,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:28,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:29,054 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:29,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:29,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:29,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:29,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984073366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:29,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:29,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2021-11-19 05:34:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425466338] [2021-11-19 05:34:29,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:34:29,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:34:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:29,674 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 16 states have internal predecessors, (78), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:30,196 INFO L93 Difference]: Finished difference Result 484 states and 626 transitions. [2021-11-19 05:34:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:34:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 16 states have internal predecessors, (78), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2021-11-19 05:34:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:30,198 INFO L225 Difference]: With dead ends: 484 [2021-11-19 05:34:30,198 INFO L226 Difference]: Without dead ends: 484 [2021-11-19 05:34:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:34:30,199 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 217 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:30,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 319 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 393 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2021-11-19 05:34:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-19 05:34:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 470. [2021-11-19 05:34:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 370 states have (on average 1.3675675675675676) internal successors, (506), 400 states have internal predecessors, (506), 34 states have call successors, (34), 33 states have call predecessors, (34), 49 states have return successors, (76), 36 states have call predecessors, (76), 33 states have call successors, (76) [2021-11-19 05:34:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 616 transitions. [2021-11-19 05:34:30,213 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 616 transitions. Word has length 49 [2021-11-19 05:34:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:30,213 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 616 transitions. [2021-11-19 05:34:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 16 states have internal predecessors, (78), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 616 transitions. [2021-11-19 05:34:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:34:30,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:30,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:30,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-19 05:34:30,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 05:34:30,431 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting c1Err1ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1453755223, now seen corresponding path program 1 times [2021-11-19 05:34:30,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:30,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401144996] [2021-11-19 05:34:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:30,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:30,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:30,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401144996] [2021-11-19 05:34:30,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401144996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:30,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308487877] [2021-11-19 05:34:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:30,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:30,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:30,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 05:34:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:30,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:34:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:30,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:30,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308487877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:30,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:30,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-11-19 05:34:30,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943687047] [2021-11-19 05:34:30,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:30,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:34:30,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:34:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:30,939 INFO L87 Difference]: Start difference. First operand 470 states and 616 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:31,116 INFO L93 Difference]: Finished difference Result 469 states and 610 transitions. [2021-11-19 05:34:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:34:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-19 05:34:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:31,119 INFO L225 Difference]: With dead ends: 469 [2021-11-19 05:34:31,119 INFO L226 Difference]: Without dead ends: 469 [2021-11-19 05:34:31,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:31,120 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:31,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:34:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-19 05:34:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2021-11-19 05:34:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 370 states have (on average 1.345945945945946) internal successors, (498), 397 states have internal predecessors, (498), 34 states have call successors, (34), 33 states have call predecessors, (34), 49 states have return successors, (76), 36 states have call predecessors, (76), 33 states have call successors, (76) [2021-11-19 05:34:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 608 transitions. [2021-11-19 05:34:31,133 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 608 transitions. Word has length 51 [2021-11-19 05:34:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:31,133 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 608 transitions. [2021-11-19 05:34:31,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 608 transitions. [2021-11-19 05:34:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:34:31,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:31,134 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:31,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:31,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 05:34:31,363 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash 361276064, now seen corresponding path program 1 times [2021-11-19 05:34:31,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:31,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036728513] [2021-11-19 05:34:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:31,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:34:31,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:31,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036728513] [2021-11-19 05:34:31,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036728513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:31,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074974745] [2021-11-19 05:34:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:31,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:31,607 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:31,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 05:34:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:34:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:31,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:31,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:32,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:32,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:32,245 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:32,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:32,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:32,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074974745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:32,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:32,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2021-11-19 05:34:32,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116256116] [2021-11-19 05:34:32,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:32,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:34:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:34:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:34:32,456 INFO L87 Difference]: Start difference. First operand 467 states and 608 transitions. Second operand has 19 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 14 states have internal predecessors, (63), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:33,034 INFO L93 Difference]: Finished difference Result 510 states and 640 transitions. [2021-11-19 05:34:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:34:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 14 states have internal predecessors, (63), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 56 [2021-11-19 05:34:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:33,046 INFO L225 Difference]: With dead ends: 510 [2021-11-19 05:34:33,046 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 05:34:33,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 05:34:33,048 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 372 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:33,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 143 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 370 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2021-11-19 05:34:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 05:34:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 473. [2021-11-19 05:34:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 376 states have (on average 1.3430851063829787) internal successors, (505), 403 states have internal predecessors, (505), 34 states have call successors, (34), 33 states have call predecessors, (34), 49 states have return successors, (71), 36 states have call predecessors, (71), 33 states have call successors, (71) [2021-11-19 05:34:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 610 transitions. [2021-11-19 05:34:33,061 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 610 transitions. Word has length 56 [2021-11-19 05:34:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:33,062 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 610 transitions. [2021-11-19 05:34:33,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 14 states have internal predecessors, (63), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 610 transitions. [2021-11-19 05:34:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 05:34:33,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:33,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:33,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:33,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:33,288 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting c1Err2ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2116738998, now seen corresponding path program 1 times [2021-11-19 05:34:33,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:33,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479588157] [2021-11-19 05:34:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:33,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479588157] [2021-11-19 05:34:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479588157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831055118] [2021-11-19 05:34:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:33,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:33,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:33,383 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:33,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 05:34:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 05:34:33,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:33,673 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:34:33,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 05:34:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:33,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:34,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831055118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:34,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:34,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-19 05:34:34,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090941309] [2021-11-19 05:34:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:34,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:34:34,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:34:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:34:34,059 INFO L87 Difference]: Start difference. First operand 473 states and 610 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 05:34:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:34,258 INFO L93 Difference]: Finished difference Result 523 states and 657 transitions. [2021-11-19 05:34:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:34:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 52 [2021-11-19 05:34:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:34,262 INFO L225 Difference]: With dead ends: 523 [2021-11-19 05:34:34,262 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 05:34:34,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:34:34,263 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 86 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 132 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 169 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2021-11-19 05:34:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 05:34:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 491. [2021-11-19 05:34:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 392 states have (on average 1.3239795918367347) internal successors, (519), 419 states have internal predecessors, (519), 36 states have call successors, (36), 35 states have call predecessors, (36), 49 states have return successors, (73), 36 states have call predecessors, (73), 35 states have call successors, (73) [2021-11-19 05:34:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 628 transitions. [2021-11-19 05:34:34,277 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 628 transitions. Word has length 52 [2021-11-19 05:34:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:34,277 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 628 transitions. [2021-11-19 05:34:34,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 05:34:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 628 transitions. [2021-11-19 05:34:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:34:34,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:34,279 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:34,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-19 05:34:34,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-19 05:34:34,503 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 642267644, now seen corresponding path program 2 times [2021-11-19 05:34:34,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:34,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193832978] [2021-11-19 05:34:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:34,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:34,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:34,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:34,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:34,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:34,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193832978] [2021-11-19 05:34:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193832978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:34,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015656281] [2021-11-19 05:34:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:34:34,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:34,590 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:34,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 05:34:34,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:34:34,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:34:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:34,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:34,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015656281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:34,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:34,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-11-19 05:34:34,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134734205] [2021-11-19 05:34:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:34:34,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:34:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:34,855 INFO L87 Difference]: Start difference. First operand 491 states and 628 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:34,887 INFO L93 Difference]: Finished difference Result 502 states and 621 transitions. [2021-11-19 05:34:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:34:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-19 05:34:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:34,891 INFO L225 Difference]: With dead ends: 502 [2021-11-19 05:34:34,891 INFO L226 Difference]: Without dead ends: 502 [2021-11-19 05:34:34,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:34:34,893 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 28 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:34,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 221 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-19 05:34:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 476. [2021-11-19 05:34:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 377 states have (on average 1.2864721485411141) internal successors, (485), 404 states have internal predecessors, (485), 36 states have call successors, (36), 35 states have call predecessors, (36), 49 states have return successors, (73), 36 states have call predecessors, (73), 35 states have call successors, (73) [2021-11-19 05:34:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 594 transitions. [2021-11-19 05:34:34,908 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 594 transitions. Word has length 51 [2021-11-19 05:34:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:34,910 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 594 transitions. [2021-11-19 05:34:34,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 594 transitions. [2021-11-19 05:34:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:34:34,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:34,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:34,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:35,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:35,130 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1350621373, now seen corresponding path program 1 times [2021-11-19 05:34:35,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:35,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559489666] [2021-11-19 05:34:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:35,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:35,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:35,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559489666] [2021-11-19 05:34:35,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559489666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:35,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154675202] [2021-11-19 05:34:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:35,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:35,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:35,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 05:34:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:35,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:34:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:35,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:35,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:35,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:35,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:35,929 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:35,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:35,933 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:36,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154675202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:36,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:36,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2021-11-19 05:34:36,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800901305] [2021-11-19 05:34:36,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:36,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:34:36,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:34:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:36,525 INFO L87 Difference]: Start difference. First operand 476 states and 594 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:37,024 INFO L93 Difference]: Finished difference Result 501 states and 616 transitions. [2021-11-19 05:34:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:34:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 51 [2021-11-19 05:34:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:37,026 INFO L225 Difference]: With dead ends: 501 [2021-11-19 05:34:37,026 INFO L226 Difference]: Without dead ends: 501 [2021-11-19 05:34:37,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:34:37,027 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 365 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:37,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 246 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 329 Invalid, 0 Unknown, 366 Unchecked, 0.2s Time] [2021-11-19 05:34:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-19 05:34:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 483. [2021-11-19 05:34:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 381 states have (on average 1.2913385826771653) internal successors, (492), 409 states have internal predecessors, (492), 37 states have call successors, (37), 36 states have call predecessors, (37), 51 states have return successors, (74), 37 states have call predecessors, (74), 36 states have call successors, (74) [2021-11-19 05:34:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 603 transitions. [2021-11-19 05:34:37,040 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 603 transitions. Word has length 51 [2021-11-19 05:34:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:37,040 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 603 transitions. [2021-11-19 05:34:37,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 7 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:34:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 603 transitions. [2021-11-19 05:34:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:34:37,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:37,042 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:37,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:37,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-19 05:34:37,265 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash -706053537, now seen corresponding path program 1 times [2021-11-19 05:34:37,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:37,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322755786] [2021-11-19 05:34:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:37,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:34:37,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:37,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322755786] [2021-11-19 05:34:37,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322755786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:37,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071503144] [2021-11-19 05:34:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:37,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:37,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:37,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:37,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 05:34:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 05:34:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:37,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:37,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 05:34:38,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:38,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:34:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:38,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:34:38,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-19 05:34:39,080 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 05:34:39,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-11-19 05:34:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:34:39,096 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-11-19 05:34:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2021-11-19 05:34:39,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2021-11-19 05:34:39,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-19 05:34:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:34:39,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:39,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071503144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:39,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:39,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2021-11-19 05:34:39,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817906896] [2021-11-19 05:34:39,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 05:34:39,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 05:34:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:34:39,651 INFO L87 Difference]: Start difference. First operand 483 states and 603 transitions. Second operand has 30 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 9 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:34:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:41,602 INFO L93 Difference]: Finished difference Result 519 states and 628 transitions. [2021-11-19 05:34:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:34:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 9 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 58 [2021-11-19 05:34:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:41,606 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:34:41,606 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 05:34:41,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 67 SyntacticMatches, 14 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 05:34:41,608 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 439 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:41,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 487 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 422 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2021-11-19 05:34:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 05:34:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 488. [2021-11-19 05:34:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 384 states have (on average 1.2760416666666667) internal successors, (490), 413 states have internal predecessors, (490), 38 states have call successors, (38), 36 states have call predecessors, (38), 52 states have return successors, (75), 38 states have call predecessors, (75), 37 states have call successors, (75) [2021-11-19 05:34:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 603 transitions. [2021-11-19 05:34:41,622 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 603 transitions. Word has length 58 [2021-11-19 05:34:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:41,622 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 603 transitions. [2021-11-19 05:34:41,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.16) internal successors, (79), 23 states have internal predecessors, (79), 9 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:34:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 603 transitions. [2021-11-19 05:34:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 05:34:41,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:41,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:41,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-19 05:34:41,843 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:41,843 INFO L85 PathProgramCache]: Analyzing trace with hash -412823075, now seen corresponding path program 1 times [2021-11-19 05:34:41,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:41,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047917150] [2021-11-19 05:34:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:41,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:41,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:42,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:42,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047917150] [2021-11-19 05:34:42,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047917150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:42,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615589268] [2021-11-19 05:34:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:42,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:42,031 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 05:34:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 05:34:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:42,219 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:34:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 05:34:42,431 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 05:34:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-19 05:34:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:42,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:34:43,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615589268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:43,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:43,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2021-11-19 05:34:43,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442388821] [2021-11-19 05:34:43,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:43,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:34:43,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:43,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:34:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:34:43,014 INFO L87 Difference]: Start difference. First operand 488 states and 603 transitions. Second operand has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (20), 11 states have call predecessors, (20), 7 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:34:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:43,335 INFO L93 Difference]: Finished difference Result 507 states and 616 transitions. [2021-11-19 05:34:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:34:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (20), 11 states have call predecessors, (20), 7 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 59 [2021-11-19 05:34:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:43,338 INFO L225 Difference]: With dead ends: 507 [2021-11-19 05:34:43,338 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 05:34:43,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:34:43,340 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 80 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:43,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 142 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 176 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2021-11-19 05:34:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 05:34:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 488. [2021-11-19 05:34:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 384 states have (on average 1.265625) internal successors, (486), 413 states have internal predecessors, (486), 38 states have call successors, (38), 36 states have call predecessors, (38), 52 states have return successors, (75), 38 states have call predecessors, (75), 37 states have call successors, (75) [2021-11-19 05:34:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 599 transitions. [2021-11-19 05:34:43,352 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 599 transitions. Word has length 59 [2021-11-19 05:34:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:43,353 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 599 transitions. [2021-11-19 05:34:43,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 12 states have internal predecessors, (78), 6 states have call successors, (20), 11 states have call predecessors, (20), 7 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-19 05:34:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 599 transitions. [2021-11-19 05:34:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 05:34:43,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:43,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:43,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:43,579 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash 87386657, now seen corresponding path program 1 times [2021-11-19 05:34:43,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:43,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266788423] [2021-11-19 05:34:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:34:43,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:43,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266788423] [2021-11-19 05:34:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266788423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:43,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643690323] [2021-11-19 05:34:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:43,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:43,811 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 05:34:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 05:34:43,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:43,995 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:34:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-11-19 05:34:44,004 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:44,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-19 05:34:44,363 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 05:34:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 41 [2021-11-19 05:34:44,367 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:34:44,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 29 [2021-11-19 05:34:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:44,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:44,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643690323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:44,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:44,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-11-19 05:34:44,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547881685] [2021-11-19 05:34:44,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:44,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:34:44,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:34:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:34:44,752 INFO L87 Difference]: Start difference. First operand 488 states and 599 transitions. Second operand has 18 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 7 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 05:34:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:45,555 INFO L93 Difference]: Finished difference Result 519 states and 626 transitions. [2021-11-19 05:34:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:34:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 7 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2021-11-19 05:34:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:45,557 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:34:45,557 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 05:34:45,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:34:45,558 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 173 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:45,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 268 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 499 Invalid, 0 Unknown, 348 Unchecked, 0.3s Time] [2021-11-19 05:34:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 05:34:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 502. [2021-11-19 05:34:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 396 states have (on average 1.2651515151515151) internal successors, (501), 426 states have internal predecessors, (501), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 614 transitions. [2021-11-19 05:34:45,571 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 614 transitions. Word has length 60 [2021-11-19 05:34:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:45,571 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 614 transitions. [2021-11-19 05:34:45,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.866666666666666) internal successors, (73), 11 states have internal predecessors, (73), 7 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 05:34:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 614 transitions. [2021-11-19 05:34:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:34:45,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:45,573 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:45,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:45,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:45,795 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1255575890, now seen corresponding path program 2 times [2021-11-19 05:34:45,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:45,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098968957] [2021-11-19 05:34:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:45,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:34:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:34:45,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:45,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098968957] [2021-11-19 05:34:45,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098968957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:45,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896796125] [2021-11-19 05:34:45,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:34:45,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:45,935 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:45,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 05:34:46,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:34:46,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:34:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:46,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:46,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-19 05:34:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 05:34:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:34:46,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896796125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:46,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:46,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 17 [2021-11-19 05:34:46,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991003553] [2021-11-19 05:34:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:46,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:34:46,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:34:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:34:46,567 INFO L87 Difference]: Start difference. First operand 502 states and 614 transitions. Second operand has 18 states, 17 states have (on average 6.352941176470588) internal successors, (108), 15 states have internal predecessors, (108), 4 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:47,098 INFO L93 Difference]: Finished difference Result 554 states and 664 transitions. [2021-11-19 05:34:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:34:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.352941176470588) internal successors, (108), 15 states have internal predecessors, (108), 4 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) Word has length 56 [2021-11-19 05:34:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:47,100 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:34:47,100 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 05:34:47,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:34:47,101 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 451 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:47,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 184 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:34:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 05:34:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 502. [2021-11-19 05:34:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 396 states have (on average 1.25) internal successors, (495), 426 states have internal predecessors, (495), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 608 transitions. [2021-11-19 05:34:47,115 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 608 transitions. Word has length 56 [2021-11-19 05:34:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:47,116 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 608 transitions. [2021-11-19 05:34:47,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.352941176470588) internal successors, (108), 15 states have internal predecessors, (108), 4 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 608 transitions. [2021-11-19 05:34:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 05:34:47,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:47,117 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:47,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:47,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-19 05:34:47,331 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting c2Err3ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash 819301165, now seen corresponding path program 1 times [2021-11-19 05:34:47,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:47,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614957126] [2021-11-19 05:34:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:47,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:34:47,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:47,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614957126] [2021-11-19 05:34:47,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614957126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:47,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806011698] [2021-11-19 05:34:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:47,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:47,409 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:47,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 05:34:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:34:47,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:47,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806011698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:47,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:47,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-19 05:34:47,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887415664] [2021-11-19 05:34:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:47,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:34:47,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:34:47,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:47,666 INFO L87 Difference]: Start difference. First operand 502 states and 608 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:47,670 INFO L93 Difference]: Finished difference Result 501 states and 604 transitions. [2021-11-19 05:34:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:34:47,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-11-19 05:34:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:47,672 INFO L225 Difference]: With dead ends: 501 [2021-11-19 05:34:47,672 INFO L226 Difference]: Without dead ends: 501 [2021-11-19 05:34:47,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:47,673 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:47,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-19 05:34:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-11-19 05:34:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 396 states have (on average 1.2398989898989898) internal successors, (491), 425 states have internal predecessors, (491), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 604 transitions. [2021-11-19 05:34:47,683 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 604 transitions. Word has length 57 [2021-11-19 05:34:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 604 transitions. [2021-11-19 05:34:47,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 604 transitions. [2021-11-19 05:34:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 05:34:47,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:47,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:47,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-19 05:34:47,911 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1920765435, now seen corresponding path program 1 times [2021-11-19 05:34:47,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:47,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341832642] [2021-11-19 05:34:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:47,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:34:48,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341832642] [2021-11-19 05:34:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341832642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248631991] [2021-11-19 05:34:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:48,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:48,155 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:48,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 05:34:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 05:34:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:48,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:48,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:48,754 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:48,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:48,760 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:48,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:48,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:49,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248631991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:49,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:49,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-11-19 05:34:49,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048136281] [2021-11-19 05:34:49,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:49,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:34:49,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:34:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:34:49,117 INFO L87 Difference]: Start difference. First operand 501 states and 604 transitions. Second operand has 20 states, 18 states have (on average 4.166666666666667) internal successors, (75), 15 states have internal predecessors, (75), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:49,937 INFO L93 Difference]: Finished difference Result 524 states and 620 transitions. [2021-11-19 05:34:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:34:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.166666666666667) internal successors, (75), 15 states have internal predecessors, (75), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 62 [2021-11-19 05:34:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:49,940 INFO L225 Difference]: With dead ends: 524 [2021-11-19 05:34:49,940 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 05:34:49,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 05:34:49,941 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 475 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:49,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 206 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 495 Invalid, 0 Unknown, 405 Unchecked, 0.3s Time] [2021-11-19 05:34:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 05:34:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 501. [2021-11-19 05:34:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 396 states have (on average 1.2373737373737375) internal successors, (490), 425 states have internal predecessors, (490), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 603 transitions. [2021-11-19 05:34:49,952 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 603 transitions. Word has length 62 [2021-11-19 05:34:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:49,952 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 603 transitions. [2021-11-19 05:34:49,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.166666666666667) internal successors, (75), 15 states have internal predecessors, (75), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 603 transitions. [2021-11-19 05:34:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:34:49,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:49,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:49,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-19 05:34:50,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-19 05:34:50,179 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting c2Err4ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -371467596, now seen corresponding path program 1 times [2021-11-19 05:34:50,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:50,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956240886] [2021-11-19 05:34:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:34:50,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:50,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956240886] [2021-11-19 05:34:50,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956240886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:50,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314622183] [2021-11-19 05:34:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:50,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:50,243 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:50,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 05:34:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:34:50,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314622183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:50,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:50,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-19 05:34:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89865520] [2021-11-19 05:34:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:50,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:34:50,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:34:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:34:50,517 INFO L87 Difference]: Start difference. First operand 501 states and 603 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:34:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:50,552 INFO L93 Difference]: Finished difference Result 500 states and 599 transitions. [2021-11-19 05:34:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:34:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-19 05:34:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:50,561 INFO L225 Difference]: With dead ends: 500 [2021-11-19 05:34:50,562 INFO L226 Difference]: Without dead ends: 500 [2021-11-19 05:34:50,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:34:50,563 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 48 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:50,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 102 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-19 05:34:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-11-19 05:34:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 396 states have (on average 1.2272727272727273) internal successors, (486), 424 states have internal predecessors, (486), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 599 transitions. [2021-11-19 05:34:50,576 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 599 transitions. Word has length 58 [2021-11-19 05:34:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 599 transitions. [2021-11-19 05:34:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:34:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 599 transitions. [2021-11-19 05:34:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 05:34:50,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:50,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:50,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:50,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-19 05:34:50,806 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting c2Err5ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1369406479, now seen corresponding path program 1 times [2021-11-19 05:34:50,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:50,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094721223] [2021-11-19 05:34:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:34:50,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:50,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094721223] [2021-11-19 05:34:50,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094721223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:50,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031856523] [2021-11-19 05:34:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:50,881 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 05:34:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:34:51,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:51,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031856523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:51,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:34:51,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-19 05:34:51,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928512080] [2021-11-19 05:34:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:51,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:34:51,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:34:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:51,122 INFO L87 Difference]: Start difference. First operand 500 states and 599 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:51,127 INFO L93 Difference]: Finished difference Result 499 states and 595 transitions. [2021-11-19 05:34:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:34:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-19 05:34:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:51,129 INFO L225 Difference]: With dead ends: 499 [2021-11-19 05:34:51,129 INFO L226 Difference]: Without dead ends: 499 [2021-11-19 05:34:51,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:51,130 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:51,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:34:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-19 05:34:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2021-11-19 05:34:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 396 states have (on average 1.2171717171717171) internal successors, (482), 423 states have internal predecessors, (482), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 595 transitions. [2021-11-19 05:34:51,140 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 595 transitions. Word has length 59 [2021-11-19 05:34:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:51,140 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 595 transitions. [2021-11-19 05:34:51,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:34:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 595 transitions. [2021-11-19 05:34:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 05:34:51,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:51,142 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:51,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-19 05:34:51,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:51,367 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 980785511, now seen corresponding path program 3 times [2021-11-19 05:34:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:51,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976435942] [2021-11-19 05:34:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:51,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:34:51,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:51,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976435942] [2021-11-19 05:34:51,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976435942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:51,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368236730] [2021-11-19 05:34:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:34:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:51,655 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 05:34:51,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 05:34:51,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 05:34:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:52,224 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-19 05:34:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:52,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368236730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:52,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2021-11-19 05:34:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215627568] [2021-11-19 05:34:52,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:52,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:34:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:34:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:52,722 INFO L87 Difference]: Start difference. First operand 499 states and 595 transitions. Second operand has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 17 states have internal predecessors, (79), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:53,509 INFO L93 Difference]: Finished difference Result 511 states and 606 transitions. [2021-11-19 05:34:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 05:34:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 17 states have internal predecessors, (79), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 64 [2021-11-19 05:34:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:53,511 INFO L225 Difference]: With dead ends: 511 [2021-11-19 05:34:53,511 INFO L226 Difference]: Without dead ends: 511 [2021-11-19 05:34:53,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=367, Invalid=1355, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 05:34:53,512 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 275 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:53,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 211 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 483 Invalid, 0 Unknown, 310 Unchecked, 0.3s Time] [2021-11-19 05:34:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-19 05:34:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 502. [2021-11-19 05:34:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 399 states have (on average 1.2155388471177946) internal successors, (485), 426 states have internal predecessors, (485), 39 states have call successors, (39), 37 states have call predecessors, (39), 53 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2021-11-19 05:34:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 598 transitions. [2021-11-19 05:34:53,522 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 598 transitions. Word has length 64 [2021-11-19 05:34:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:53,522 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 598 transitions. [2021-11-19 05:34:53,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 17 states have internal predecessors, (79), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:34:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 598 transitions. [2021-11-19 05:34:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 05:34:53,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:53,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:53,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-19 05:34:53,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:53,747 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash 569055365, now seen corresponding path program 1 times [2021-11-19 05:34:53,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:53,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186505244] [2021-11-19 05:34:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:53,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:34:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:34:53,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:53,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186505244] [2021-11-19 05:34:53,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186505244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:53,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996718697] [2021-11-19 05:34:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:53,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:53,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:53,895 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:53,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 05:34:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:34:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:54,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:34:54,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996718697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:54,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:54,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2021-11-19 05:34:54,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287712774] [2021-11-19 05:34:54,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:54,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:34:54,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:34:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:34:54,419 INFO L87 Difference]: Start difference. First operand 502 states and 598 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 05:34:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:54,719 INFO L93 Difference]: Finished difference Result 436 states and 503 transitions. [2021-11-19 05:34:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:34:54,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-11-19 05:34:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:54,721 INFO L225 Difference]: With dead ends: 436 [2021-11-19 05:34:54,721 INFO L226 Difference]: Without dead ends: 436 [2021-11-19 05:34:54,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:34:54,721 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 124 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:54,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 98 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:34:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-19 05:34:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 427. [2021-11-19 05:34:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 344 states have (on average 1.191860465116279) internal successors, (410), 364 states have internal predecessors, (410), 36 states have call successors, (36), 34 states have call predecessors, (36), 36 states have return successors, (48), 28 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-19 05:34:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 494 transitions. [2021-11-19 05:34:54,731 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 494 transitions. Word has length 61 [2021-11-19 05:34:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:54,731 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 494 transitions. [2021-11-19 05:34:54,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 05:34:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 494 transitions. [2021-11-19 05:34:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 05:34:54,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:54,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:54,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-19 05:34:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:54,947 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -274157613, now seen corresponding path program 2 times [2021-11-19 05:34:54,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:54,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974448918] [2021-11-19 05:34:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:54,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:34:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:34:55,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974448918] [2021-11-19 05:34:55,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974448918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:55,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101803508] [2021-11-19 05:34:55,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:34:55,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:55,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:55,176 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:55,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 05:34:55,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:34:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-19 05:34:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:55,363 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:34:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-19 05:34:55,389 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:34:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-19 05:34:55,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:34:55,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:34:56,116 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 05:34:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2021-11-19 05:34:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-19 05:34:56,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-19 05:34:56,157 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 05:34:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 29 [2021-11-19 05:34:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:34:56,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:56,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101803508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:56,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:56,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-11-19 05:34:56,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567793017] [2021-11-19 05:34:56,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:56,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:34:56,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:34:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:34:56,753 INFO L87 Difference]: Start difference. First operand 427 states and 494 transitions. Second operand has 22 states, 17 states have (on average 4.117647058823529) internal successors, (70), 14 states have internal predecessors, (70), 8 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-19 05:34:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:57,965 INFO L93 Difference]: Finished difference Result 431 states and 494 transitions. [2021-11-19 05:34:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 05:34:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 4.117647058823529) internal successors, (70), 14 states have internal predecessors, (70), 8 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 60 [2021-11-19 05:34:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:57,968 INFO L225 Difference]: With dead ends: 431 [2021-11-19 05:34:57,968 INFO L226 Difference]: Without dead ends: 431 [2021-11-19 05:34:57,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 05:34:57,969 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 254 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:57,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 307 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 606 Invalid, 0 Unknown, 223 Unchecked, 0.4s Time] [2021-11-19 05:34:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-19 05:34:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2021-11-19 05:34:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 344 states have (on average 1.186046511627907) internal successors, (408), 364 states have internal predecessors, (408), 36 states have call successors, (36), 34 states have call predecessors, (36), 36 states have return successors, (48), 28 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-19 05:34:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 492 transitions. [2021-11-19 05:34:57,978 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 492 transitions. Word has length 60 [2021-11-19 05:34:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:57,979 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 492 transitions. [2021-11-19 05:34:57,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 4.117647058823529) internal successors, (70), 14 states have internal predecessors, (70), 8 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-19 05:34:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 492 transitions. [2021-11-19 05:34:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-19 05:34:57,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:57,980 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:58,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:58,195 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:34:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1523179530, now seen corresponding path program 1 times [2021-11-19 05:34:58,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:58,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195764626] [2021-11-19 05:34:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:58,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:34:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:34:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:34:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:34:58,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:58,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195764626] [2021-11-19 05:34:58,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195764626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:58,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944228968] [2021-11-19 05:34:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:58,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:58,503 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:58,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 05:34:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 05:34:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:34:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:58,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:58,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:34:59,098 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:34:59,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:34:59,102 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:34:59,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:34:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:59,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:59,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944228968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:59,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:59,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2021-11-19 05:34:59,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880995864] [2021-11-19 05:34:59,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:59,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:34:59,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:34:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:34:59,540 INFO L87 Difference]: Start difference. First operand 427 states and 492 transitions. Second operand has 21 states, 19 states have (on average 4.368421052631579) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:35:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:00,495 INFO L93 Difference]: Finished difference Result 439 states and 500 transitions. [2021-11-19 05:35:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:35:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.368421052631579) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2021-11-19 05:35:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:00,498 INFO L225 Difference]: With dead ends: 439 [2021-11-19 05:35:00,498 INFO L226 Difference]: Without dead ends: 439 [2021-11-19 05:35:00,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:35:00,499 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 362 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:00,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 243 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 701 Invalid, 0 Unknown, 279 Unchecked, 0.4s Time] [2021-11-19 05:35:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-19 05:35:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 424. [2021-11-19 05:35:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 341 states have (on average 1.1818181818181819) internal successors, (403), 361 states have internal predecessors, (403), 36 states have call successors, (36), 34 states have call predecessors, (36), 36 states have return successors, (48), 28 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-19 05:35:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 487 transitions. [2021-11-19 05:35:00,507 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 487 transitions. Word has length 66 [2021-11-19 05:35:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:00,507 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 487 transitions. [2021-11-19 05:35:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.368421052631579) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:35:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 487 transitions. [2021-11-19 05:35:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 05:35:00,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:00,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:00,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:00,728 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting c2Err8ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1905860232, now seen corresponding path program 1 times [2021-11-19 05:35:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538687649] [2021-11-19 05:35:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:00,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:35:00,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:00,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538687649] [2021-11-19 05:35:00,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538687649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:00,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884762199] [2021-11-19 05:35:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:00,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:00,803 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:00,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 05:35:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:35:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:35:01,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:35:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884762199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:01,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:35:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-11-19 05:35:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650445973] [2021-11-19 05:35:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:01,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:35:01,076 INFO L87 Difference]: Start difference. First operand 424 states and 487 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:35:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:01,079 INFO L93 Difference]: Finished difference Result 399 states and 454 transitions. [2021-11-19 05:35:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2021-11-19 05:35:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:01,082 INFO L225 Difference]: With dead ends: 399 [2021-11-19 05:35:01,082 INFO L226 Difference]: Without dead ends: 399 [2021-11-19 05:35:01,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:35:01,084 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:01,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-19 05:35:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-11-19 05:35:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 317 states have (on average 1.167192429022082) internal successors, (370), 336 states have internal predecessors, (370), 36 states have call successors, (36), 34 states have call predecessors, (36), 36 states have return successors, (48), 28 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-19 05:35:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 454 transitions. [2021-11-19 05:35:01,093 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 454 transitions. Word has length 62 [2021-11-19 05:35:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:01,094 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 454 transitions. [2021-11-19 05:35:01,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:35:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 454 transitions. [2021-11-19 05:35:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 05:35:01,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:01,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:01,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:01,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-19 05:35:01,319 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1463952579, now seen corresponding path program 1 times [2021-11-19 05:35:01,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:01,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779031561] [2021-11-19 05:35:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:01,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:01,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:02,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:02,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779031561] [2021-11-19 05:35:02,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779031561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:02,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263337395] [2021-11-19 05:35:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:02,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:02,388 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:02,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 05:35:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:02,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 05:35:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:02,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:35:02,595 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:02,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 05:35:02,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:35:02,789 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-19 05:35:02,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-11-19 05:35:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:02,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:03,092 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-19 05:35:03,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-11-19 05:35:03,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263337395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:03,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:03,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 22 [2021-11-19 05:35:03,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279345176] [2021-11-19 05:35:03,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:03,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 05:35:03,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:03,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 05:35:03,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:35:03,185 INFO L87 Difference]: Start difference. First operand 399 states and 454 transitions. Second operand has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 7 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 05:35:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:04,200 INFO L93 Difference]: Finished difference Result 429 states and 479 transitions. [2021-11-19 05:35:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 05:35:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 7 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 64 [2021-11-19 05:35:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:04,202 INFO L225 Difference]: With dead ends: 429 [2021-11-19 05:35:04,202 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 05:35:04,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=1612, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:35:04,203 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 256 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:04,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 280 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 329 Invalid, 0 Unknown, 332 Unchecked, 0.3s Time] [2021-11-19 05:35:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 05:35:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 400. [2021-11-19 05:35:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 317 states have (on average 1.160883280757098) internal successors, (368), 337 states have internal predecessors, (368), 39 states have call successors, (39), 35 states have call predecessors, (39), 35 states have return successors, (45), 27 states have call predecessors, (45), 38 states have call successors, (45) [2021-11-19 05:35:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 452 transitions. [2021-11-19 05:35:04,209 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 452 transitions. Word has length 64 [2021-11-19 05:35:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 452 transitions. [2021-11-19 05:35:04,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 7 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-19 05:35:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 452 transitions. [2021-11-19 05:35:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 05:35:04,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:04,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:04,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:04,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-19 05:35:04,411 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1463952578, now seen corresponding path program 1 times [2021-11-19 05:35:04,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:04,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486464026] [2021-11-19 05:35:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:04,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:04,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:04,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486464026] [2021-11-19 05:35:04,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486464026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:04,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496485994] [2021-11-19 05:35:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:04,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:04,675 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:04,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 05:35:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:04,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:35:04,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:05,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-19 05:35:05,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:35:05,195 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:35:05,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-19 05:35:05,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:05,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-19 05:35:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:35:05,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:35:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496485994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:05,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:35:05,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2021-11-19 05:35:05,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158528038] [2021-11-19 05:35:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:35:05,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:35:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:35:05,302 INFO L87 Difference]: Start difference. First operand 400 states and 452 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:35:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:05,512 INFO L93 Difference]: Finished difference Result 507 states and 571 transitions. [2021-11-19 05:35:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:35:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2021-11-19 05:35:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:05,515 INFO L225 Difference]: With dead ends: 507 [2021-11-19 05:35:05,515 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 05:35:05,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-11-19 05:35:05,515 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 151 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:05,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 130 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 92 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-11-19 05:35:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 05:35:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 400. [2021-11-19 05:35:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 317 states have (on average 1.1577287066246056) internal successors, (367), 337 states have internal predecessors, (367), 39 states have call successors, (39), 35 states have call predecessors, (39), 35 states have return successors, (45), 27 states have call predecessors, (45), 38 states have call successors, (45) [2021-11-19 05:35:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 451 transitions. [2021-11-19 05:35:05,525 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 451 transitions. Word has length 64 [2021-11-19 05:35:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:05,525 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 451 transitions. [2021-11-19 05:35:05,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:35:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 451 transitions. [2021-11-19 05:35:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 05:35:05,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:05,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:05,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-19 05:35:05,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-19 05:35:05,741 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1862110333, now seen corresponding path program 1 times [2021-11-19 05:35:05,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:05,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16892112] [2021-11-19 05:35:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:05,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:05,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:06,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:06,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:07,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:07,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16892112] [2021-11-19 05:35:07,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16892112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:07,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050621912] [2021-11-19 05:35:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:07,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:07,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:07,400 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:07,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 05:35:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 05:35:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:07,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-19 05:35:07,822 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 05:35:07,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-19 05:35:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-19 05:35:08,305 INFO L354 Elim1Store]: treesize reduction 64, result has 35.4 percent of original size [2021-11-19 05:35:08,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 46 [2021-11-19 05:35:08,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:35:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:08,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:08,758 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-19 05:35:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 70 [2021-11-19 05:35:08,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050621912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:08,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:08,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2021-11-19 05:35:08,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972345848] [2021-11-19 05:35:08,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:08,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 05:35:08,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 05:35:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 05:35:08,932 INFO L87 Difference]: Start difference. First operand 400 states and 451 transitions. Second operand has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 12 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-19 05:35:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:10,585 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2021-11-19 05:35:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:35:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 12 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) Word has length 65 [2021-11-19 05:35:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:10,601 INFO L225 Difference]: With dead ends: 430 [2021-11-19 05:35:10,601 INFO L226 Difference]: Without dead ends: 430 [2021-11-19 05:35:10,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=532, Invalid=4160, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 05:35:10,604 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 500 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:10,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 398 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 901 Invalid, 0 Unknown, 426 Unchecked, 0.5s Time] [2021-11-19 05:35:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-19 05:35:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 400. [2021-11-19 05:35:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 317 states have (on average 1.1514195583596214) internal successors, (365), 337 states have internal predecessors, (365), 39 states have call successors, (39), 35 states have call predecessors, (39), 35 states have return successors, (45), 27 states have call predecessors, (45), 38 states have call successors, (45) [2021-11-19 05:35:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 449 transitions. [2021-11-19 05:35:10,613 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 449 transitions. Word has length 65 [2021-11-19 05:35:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 449 transitions. [2021-11-19 05:35:10,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 12 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-19 05:35:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 449 transitions. [2021-11-19 05:35:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 05:35:10,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:10,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:10,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-19 05:35:10,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-19 05:35:10,831 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1513329537, now seen corresponding path program 1 times [2021-11-19 05:35:10,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:10,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834138353] [2021-11-19 05:35:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:10,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:10,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:10,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:10,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:11,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:11,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834138353] [2021-11-19 05:35:11,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834138353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:11,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909701654] [2021-11-19 05:35:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:11,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:11,208 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:11,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-19 05:35:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:11,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 05:35:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:11,417 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 05:35:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 24 [2021-11-19 05:35:11,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:11,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 05:35:11,693 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-19 05:35:11,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 38 [2021-11-19 05:35:11,959 INFO L354 Elim1Store]: treesize reduction 94, result has 17.5 percent of original size [2021-11-19 05:35:11,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2021-11-19 05:35:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909701654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:12,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:12,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-19 05:35:12,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151972390] [2021-11-19 05:35:12,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:12,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:35:12,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:35:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:35:12,398 INFO L87 Difference]: Start difference. First operand 400 states and 449 transitions. Second operand has 25 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 17 states have internal predecessors, (82), 8 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 05:35:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:13,064 INFO L93 Difference]: Finished difference Result 419 states and 468 transitions. [2021-11-19 05:35:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:35:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 17 states have internal predecessors, (82), 8 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 67 [2021-11-19 05:35:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:13,066 INFO L225 Difference]: With dead ends: 419 [2021-11-19 05:35:13,066 INFO L226 Difference]: Without dead ends: 419 [2021-11-19 05:35:13,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 05:35:13,067 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 138 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:13,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 211 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 341 Invalid, 0 Unknown, 396 Unchecked, 0.2s Time] [2021-11-19 05:35:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-19 05:35:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 399. [2021-11-19 05:35:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 317 states have (on average 1.1451104100946372) internal successors, (363), 336 states have internal predecessors, (363), 39 states have call successors, (39), 35 states have call predecessors, (39), 35 states have return successors, (45), 27 states have call predecessors, (45), 38 states have call successors, (45) [2021-11-19 05:35:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 447 transitions. [2021-11-19 05:35:13,074 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 447 transitions. Word has length 67 [2021-11-19 05:35:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:13,075 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 447 transitions. [2021-11-19 05:35:13,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 17 states have internal predecessors, (82), 8 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 05:35:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 447 transitions. [2021-11-19 05:35:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 05:35:13,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:13,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:13,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:13,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-19 05:35:13,295 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 331424703, now seen corresponding path program 1 times [2021-11-19 05:35:13,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:13,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859611223] [2021-11-19 05:35:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:13,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:13,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:13,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859611223] [2021-11-19 05:35:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859611223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:13,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402596103] [2021-11-19 05:35:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:13,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:13,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:13,689 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:13,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 05:35:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 05:35:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:13,899 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:35:13,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-19 05:35:13,905 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-19 05:35:14,084 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-19 05:35:14,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 34 [2021-11-19 05:35:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:14,393 INFO L354 Elim1Store]: treesize reduction 42, result has 48.8 percent of original size [2021-11-19 05:35:14,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 71 [2021-11-19 05:35:16,999 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-19 05:35:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:17,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:35:17,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402596103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:17,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:17,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-11-19 05:35:17,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758610119] [2021-11-19 05:35:17,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:17,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 05:35:17,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 05:35:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:35:17,377 INFO L87 Difference]: Start difference. First operand 399 states and 447 transitions. Second operand has 29 states, 24 states have (on average 4.333333333333333) internal successors, (104), 20 states have internal predecessors, (104), 11 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-19 05:35:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:18,854 INFO L93 Difference]: Finished difference Result 433 states and 478 transitions. [2021-11-19 05:35:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:35:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.333333333333333) internal successors, (104), 20 states have internal predecessors, (104), 11 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) Word has length 68 [2021-11-19 05:35:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:18,857 INFO L225 Difference]: With dead ends: 433 [2021-11-19 05:35:18,857 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 05:35:18,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 05:35:18,858 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 255 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 998 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:18,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 424 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 938 Invalid, 0 Unknown, 998 Unchecked, 0.5s Time] [2021-11-19 05:35:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 05:35:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 401. [2021-11-19 05:35:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 319 states have (on average 1.141065830721003) internal successors, (364), 335 states have internal predecessors, (364), 40 states have call successors, (40), 36 states have call predecessors, (40), 35 states have return successors, (44), 29 states have call predecessors, (44), 39 states have call successors, (44) [2021-11-19 05:35:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 448 transitions. [2021-11-19 05:35:18,867 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 448 transitions. Word has length 68 [2021-11-19 05:35:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:18,867 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 448 transitions. [2021-11-19 05:35:18,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.333333333333333) internal successors, (104), 20 states have internal predecessors, (104), 11 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-19 05:35:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 448 transitions. [2021-11-19 05:35:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 05:35:18,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:18,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:18,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-19 05:35:19,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:19,095 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash 671562787, now seen corresponding path program 1 times [2021-11-19 05:35:19,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:19,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687237859] [2021-11-19 05:35:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:19,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:35:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:35:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:35:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 05:35:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:19,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:19,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687237859] [2021-11-19 05:35:19,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687237859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:19,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268054572] [2021-11-19 05:35:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:19,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:19,356 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:19,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-19 05:35:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 05:35:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:19,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-19 05:35:19,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:35:19,726 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:35:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-19 05:35:19,731 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:19,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-19 05:35:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:35:19,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:20,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268054572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:20,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:20,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2021-11-19 05:35:20,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107519455] [2021-11-19 05:35:20,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:20,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:35:20,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:35:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:35:20,200 INFO L87 Difference]: Start difference. First operand 401 states and 448 transitions. Second operand has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 17 states have internal predecessors, (93), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (13), 7 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 05:35:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:20,892 INFO L93 Difference]: Finished difference Result 477 states and 529 transitions. [2021-11-19 05:35:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:35:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 17 states have internal predecessors, (93), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (13), 7 states have call predecessors, (13), 4 states have call successors, (13) Word has length 70 [2021-11-19 05:35:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:20,894 INFO L225 Difference]: With dead ends: 477 [2021-11-19 05:35:20,894 INFO L226 Difference]: Without dead ends: 477 [2021-11-19 05:35:20,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 05:35:20,895 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 417 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:20,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 146 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 269 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2021-11-19 05:35:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-19 05:35:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 401. [2021-11-19 05:35:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 319 states have (on average 1.1379310344827587) internal successors, (363), 335 states have internal predecessors, (363), 40 states have call successors, (40), 36 states have call predecessors, (40), 35 states have return successors, (44), 29 states have call predecessors, (44), 39 states have call successors, (44) [2021-11-19 05:35:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 447 transitions. [2021-11-19 05:35:20,904 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 447 transitions. Word has length 70 [2021-11-19 05:35:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:20,904 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 447 transitions. [2021-11-19 05:35:20,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 17 states have internal predecessors, (93), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (13), 7 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 05:35:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 447 transitions. [2021-11-19 05:35:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:35:20,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:20,906 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:20,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-19 05:35:21,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:21,119 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1517502502, now seen corresponding path program 1 times [2021-11-19 05:35:21,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:21,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475022594] [2021-11-19 05:35:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:21,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:35:21,174 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:35:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:35:21,270 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:35:21,271 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 05:35:21,272 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2021-11-19 05:35:21,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c1Err0ASSERT_VIOLATIONMEMORY_FREE (21 of 23 remaining) [2021-11-19 05:35:21,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c1Err1ASSERT_VIOLATIONMEMORY_FREE (20 of 23 remaining) [2021-11-19 05:35:21,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c1Err2ASSERT_VIOLATIONMEMORY_FREE (19 of 23 remaining) [2021-11-19 05:35:21,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err0ASSERT_VIOLATIONMEMORY_FREE (18 of 23 remaining) [2021-11-19 05:35:21,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err1ASSERT_VIOLATIONMEMORY_FREE (17 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err2ASSERT_VIOLATIONMEMORY_FREE (16 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err3ASSERT_VIOLATIONMEMORY_FREE (15 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err4ASSERT_VIOLATIONMEMORY_FREE (14 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err5ASSERT_VIOLATIONMEMORY_FREE (13 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err6ASSERT_VIOLATIONMEMORY_FREE (12 of 23 remaining) [2021-11-19 05:35:21,276 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err7ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2021-11-19 05:35:21,277 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location c2Err8ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2021-11-19 05:35:21,277 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (9 of 23 remaining) [2021-11-19 05:35:21,277 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (8 of 23 remaining) [2021-11-19 05:35:21,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2021-11-19 05:35:21,278 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2021-11-19 05:35:21,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2021-11-19 05:35:21,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2021-11-19 05:35:21,279 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (3 of 23 remaining) [2021-11-19 05:35:21,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (2 of 23 remaining) [2021-11-19 05:35:21,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (1 of 23 remaining) [2021-11-19 05:35:21,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (0 of 23 remaining) [2021-11-19 05:35:21,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-19 05:35:21,283 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:21,286 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 05:35:21,320 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-19 05:35:21,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:35:21 BoogieIcfgContainer [2021-11-19 05:35:21,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 05:35:21,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 05:35:21,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 05:35:21,389 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 05:35:21,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:45" (3/4) ... [2021-11-19 05:35:21,393 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 05:35:21,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 05:35:21,393 INFO L158 Benchmark]: Toolchain (without parser) took 96688.65ms. Allocated memory was 94.4MB in the beginning and 272.6MB in the end (delta: 178.3MB). Free memory was 59.7MB in the beginning and 224.9MB in the end (delta: -165.2MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2021-11-19 05:35:21,393 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 50.3MB in the beginning and 50.3MB in the end (delta: 39.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:35:21,394 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.02ms. Allocated memory is still 94.4MB. Free memory was 59.6MB in the beginning and 59.7MB in the end (delta: -160.8kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 05:35:21,394 INFO L158 Benchmark]: Boogie Preprocessor took 78.80ms. Allocated memory is still 94.4MB. Free memory was 59.7MB in the beginning and 56.5MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:35:21,394 INFO L158 Benchmark]: RCFGBuilder took 732.90ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 56.5MB in the beginning and 93.8MB in the end (delta: -37.4MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-11-19 05:35:21,394 INFO L158 Benchmark]: TraceAbstraction took 95410.28ms. Allocated memory was 130.0MB in the beginning and 272.6MB in the end (delta: 142.6MB). Free memory was 93.3MB in the beginning and 224.9MB in the end (delta: -131.6MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-11-19 05:35:21,394 INFO L158 Benchmark]: Witness Printer took 3.93ms. Allocated memory is still 272.6MB. Free memory is still 224.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:35:21,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 50.3MB in the beginning and 50.3MB in the end (delta: 39.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.02ms. Allocated memory is still 94.4MB. Free memory was 59.6MB in the beginning and 59.7MB in the end (delta: -160.8kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.80ms. Allocated memory is still 94.4MB. Free memory was 59.7MB in the beginning and 56.5MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 732.90ms. Allocated memory was 94.4MB in the beginning and 130.0MB in the end (delta: 35.7MB). Free memory was 56.5MB in the beginning and 93.8MB in the end (delta: -37.4MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * TraceAbstraction took 95410.28ms. Allocated memory was 130.0MB in the beginning and 272.6MB in the end (delta: 142.6MB). Free memory was 93.3MB in the beginning and 224.9MB in the end (delta: -131.6MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Witness Printer took 3.93ms. Allocated memory is still 272.6MB. Free memory is still 224.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 722. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [\old(commands)=null, \old(commands)=null, \old(global)=102, \old(global)=109, \old(state)=108, commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, input={3:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L723] RET parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, input={4:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L724] RET parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L725] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, input={5:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1] [L726] return 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, \result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 85 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 95.3s, OverallIterations: 53, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 34.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12605 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12584 mSDsluCounter, 11421 SdHoareTripleChecker+Invalid, 13.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7777 IncrementalHoareTripleChecker+Unchecked, 8300 mSDsCounter, 3365 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19961 IncrementalHoareTripleChecker+Invalid, 31103 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3365 mSolverCounterUnsat, 3121 mSDtfsCounter, 19961 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4250 GetRequests, 2935 SyntacticMatches, 90 SemanticMatches, 1225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12161 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=577occurred in iteration=19, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 52 MinimizatonAttempts, 1602 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 43.1s InterpolantComputationTime, 4484 NumberOfCodeBlocks, 4476 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 4802 ConstructedInterpolants, 505 QuantifiedInterpolants, 48534 SizeOfPredicates, 212 NumberOfNonLiveVariables, 14642 ConjunctsInSsa, 985 ConjunctsInUnsatCore, 106 InterpolantComputations, 20 PerfectInterpolantSequences, 1389/2480 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 could not prove your program: unable to determine feasibility of some traces [2021-11-19 05:35:21,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:35:23,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:35:23,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:35:23,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:35:23,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:35:23,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:35:23,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:35:23,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:35:23,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:35:23,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:35:23,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:35:23,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:35:23,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:35:23,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:35:24,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:35:24,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:35:24,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:35:24,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:35:24,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:35:24,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:35:24,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:35:24,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:35:24,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:35:24,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:35:24,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:35:24,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:35:24,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:35:24,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:35:24,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:35:24,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:35:24,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:35:24,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:35:24,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:35:24,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:35:24,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:35:24,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:35:24,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:35:24,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:35:24,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:35:24,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:35:24,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:35:24,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-19 05:35:24,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:35:24,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:35:24,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:35:24,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:35:24,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:35:24,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:35:24,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:35:24,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:35:24,064 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:35:24,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:35:24,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:35:24,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:35:24,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:35:24,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:35:24,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:35:24,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 05:35:24,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 05:35:24,066 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 05:35:24,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:35:24,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 05:35:24,066 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 05:35:24,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 05:35:24,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:35:24,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:35:24,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:35:24,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:35:24,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:35:24,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:24,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:35:24,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:35:24,068 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 05:35:24,068 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 05:35:24,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:35:24,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 05:35:24,069 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-11-19 05:35:24,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:35:24,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:35:24,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:35:24,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:35:24,518 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:35:24,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-19 05:35:24,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/e7a222b17/525441737d584ba1bfc69b3765356f3e/FLAG70dcf2fdf [2021-11-19 05:35:25,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:35:25,277 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-19 05:35:25,299 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/e7a222b17/525441737d584ba1bfc69b3765356f3e/FLAG70dcf2fdf [2021-11-19 05:35:25,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/data/e7a222b17/525441737d584ba1bfc69b3765356f3e [2021-11-19 05:35:25,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:35:25,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 05:35:25,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:25,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:35:25,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:35:25,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:25" (1/1) ... [2021-11-19 05:35:25,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4050eaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:25, skipping insertion in model container [2021-11-19 05:35:25,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:25" (1/1) ... [2021-11-19 05:35:25,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:35:25,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:35:26,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:26,016 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:35:26,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:26,108 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:35:26,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26 WrapperNode [2021-11-19 05:35:26,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:26,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:35:26,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:35:26,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:35:26,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:35:26,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:35:26,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:35:26,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:35:26,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (1/1) ... [2021-11-19 05:35:26,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:26,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:26,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:35:26,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:35:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 05:35:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:35:26,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-11-19 05:35:26,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 05:35:26,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 05:35:26,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 05:35:26,331 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-19 05:35:26,331 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-11-19 05:35:26,332 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-11-19 05:35:26,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 05:35:26,332 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 05:35:26,332 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 05:35:26,332 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 05:35:26,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 05:35:26,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 05:35:26,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 05:35:26,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 05:35:26,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 05:35:26,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 05:35:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 05:35:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 05:35:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 05:35:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 05:35:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 05:35:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 05:35:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 05:35:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 05:35:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 05:35:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 05:35:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 05:35:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 05:35:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 05:35:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 05:35:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 05:35:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 05:35:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 05:35:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 05:35:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 05:35:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 05:35:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 05:35:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 05:35:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 05:35:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 05:35:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 05:35:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 05:35:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 05:35:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 05:35:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 05:35:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 05:35:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 05:35:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 05:35:26,349 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 05:35:26,349 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 05:35:26,350 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 05:35:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 05:35:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 05:35:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 05:35:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 05:35:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 05:35:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 05:35:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-19 05:35:26,356 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-19 05:35:26,356 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-19 05:35:26,356 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-19 05:35:26,356 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 05:35:26,357 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-19 05:35:26,357 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-19 05:35:26,357 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-19 05:35:26,358 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-19 05:35:26,358 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-19 05:35:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-19 05:35:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-19 05:35:26,362 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-19 05:35:26,362 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-19 05:35:26,363 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-19 05:35:26,363 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-19 05:35:26,364 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-19 05:35:26,365 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-19 05:35:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-19 05:35:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-19 05:35:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-19 05:35:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-19 05:35:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-19 05:35:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-19 05:35:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:35:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 05:35:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 05:35:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 05:35:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:35:26,748 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:35:26,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:35:27,130 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:35:27,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:35:27,138 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:35:27,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:27 BoogieIcfgContainer [2021-11-19 05:35:27,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:35:27,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:35:27,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:35:27,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:35:27,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:35:25" (1/3) ... [2021-11-19 05:35:27,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa0e2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:27, skipping insertion in model container [2021-11-19 05:35:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:26" (2/3) ... [2021-11-19 05:35:27,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa0e2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:27, skipping insertion in model container [2021-11-19 05:35:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:27" (3/3) ... [2021-11-19 05:35:27,148 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-11-19 05:35:27,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:35:27,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-11-19 05:35:27,207 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:35:27,221 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:35:27,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-11-19 05:35:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 65 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:35:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:35:27,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:27,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:27,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -317410196, now seen corresponding path program 1 times [2021-11-19 05:35:27,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:27,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832431555] [2021-11-19 05:35:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:27,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:27,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:27,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 05:35:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:35:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:27,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:27,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:27,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:27,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832431555] [2021-11-19 05:35:27,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832431555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:27,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:27,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 05:35:27,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19599418] [2021-11-19 05:35:27,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:27,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:27,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:27,812 INFO L87 Difference]: Start difference. First operand has 79 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 65 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:28,004 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-11-19 05:35:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-19 05:35:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:28,019 INFO L225 Difference]: With dead ends: 97 [2021-11-19 05:35:28,020 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 05:35:28,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:28,026 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:28,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:35:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 05:35:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-19 05:35:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 69 states have internal predecessors, (77), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-19 05:35:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-11-19 05:35:28,108 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 9 [2021-11-19 05:35:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:28,109 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-11-19 05:35:28,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-11-19 05:35:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:35:28,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:28,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:28,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:28,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:28,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -317410195, now seen corresponding path program 1 times [2021-11-19 05:35:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:28,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869010831] [2021-11-19 05:35:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:28,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:28,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:28,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 05:35:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:35:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:28,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:28,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:29,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:29,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869010831] [2021-11-19 05:35:29,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869010831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:29,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:29,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 05:35:29,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516607148] [2021-11-19 05:35:29,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:29,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:35:29,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:35:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:35:29,105 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:29,809 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2021-11-19 05:35:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:35:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 9 [2021-11-19 05:35:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:29,814 INFO L225 Difference]: With dead ends: 174 [2021-11-19 05:35:29,814 INFO L226 Difference]: Without dead ends: 174 [2021-11-19 05:35:29,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:35:29,816 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 153 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:29,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 264 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:35:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-19 05:35:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-11-19 05:35:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.6236559139784945) internal successors, (151), 114 states have internal predecessors, (151), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (38), 16 states have call predecessors, (38), 15 states have call successors, (38) [2021-11-19 05:35:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 205 transitions. [2021-11-19 05:35:29,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 205 transitions. Word has length 9 [2021-11-19 05:35:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:29,872 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 205 transitions. [2021-11-19 05:35:29,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 205 transitions. [2021-11-19 05:35:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 05:35:29,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:29,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:29,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:30,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1249781436, now seen corresponding path program 1 times [2021-11-19 05:35:30,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:30,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776880556] [2021-11-19 05:35:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:30,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:30,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:30,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 05:35:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:35:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:30,339 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:35:30,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2021-11-19 05:35:31,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-19 05:35:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:31,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:31,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-11-19 05:35:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:31,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:31,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776880556] [2021-11-19 05:35:31,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776880556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:31,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:31,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-11-19 05:35:31,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531559149] [2021-11-19 05:35:31,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:31,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:35:31,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:35:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:35:31,654 INFO L87 Difference]: Start difference. First operand 142 states and 205 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:31,911 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2021-11-19 05:35:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:35:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2021-11-19 05:35:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:31,914 INFO L225 Difference]: With dead ends: 146 [2021-11-19 05:35:31,914 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 05:35:31,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:31,916 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:31,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 295 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-11-19 05:35:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 05:35:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-19 05:35:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.597938144329897) internal successors, (155), 117 states have internal predecessors, (155), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (38), 16 states have call predecessors, (38), 15 states have call successors, (38) [2021-11-19 05:35:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 209 transitions. [2021-11-19 05:35:31,935 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 209 transitions. Word has length 10 [2021-11-19 05:35:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 209 transitions. [2021-11-19 05:35:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 209 transitions. [2021-11-19 05:35:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:35:31,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:31,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:31,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:32,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -88518740, now seen corresponding path program 1 times [2021-11-19 05:35:32,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:32,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114842339] [2021-11-19 05:35:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:32,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:32,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:32,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 05:35:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 05:35:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:35:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 05:35:32,389 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:32,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-19 05:35:32,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-11-19 05:35:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-19 05:35:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:32,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:33,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2021-11-19 05:35:33,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-19 05:35:33,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 1 [2021-11-19 05:35:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:33,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:33,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114842339] [2021-11-19 05:35:33,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114842339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:33,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:33,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-11-19 05:35:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2518303] [2021-11-19 05:35:33,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:35:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:35:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:35:33,376 INFO L87 Difference]: Start difference. First operand 146 states and 209 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:34,664 INFO L93 Difference]: Finished difference Result 278 states and 365 transitions. [2021-11-19 05:35:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:35:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2021-11-19 05:35:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:34,669 INFO L225 Difference]: With dead ends: 278 [2021-11-19 05:35:34,669 INFO L226 Difference]: Without dead ends: 278 [2021-11-19 05:35:34,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:35:34,671 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 249 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:34,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 418 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 195 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2021-11-19 05:35:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-19 05:35:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 213. [2021-11-19 05:35:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 149 states have (on average 1.5973154362416107) internal successors, (238), 171 states have internal predecessors, (238), 22 states have call successors, (22), 17 states have call predecessors, (22), 21 states have return successors, (73), 24 states have call predecessors, (73), 21 states have call successors, (73) [2021-11-19 05:35:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 333 transitions. [2021-11-19 05:35:34,730 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 333 transitions. Word has length 11 [2021-11-19 05:35:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:34,731 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 333 transitions. [2021-11-19 05:35:34,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 333 transitions. [2021-11-19 05:35:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:35:34,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:34,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:34,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:34,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:34,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1550886470, now seen corresponding path program 1 times [2021-11-19 05:35:34,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:34,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522574558] [2021-11-19 05:35:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:34,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:34,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:34,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 05:35:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:35:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:35,175 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:35:35,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-19 05:35:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:35,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:35,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:35,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522574558] [2021-11-19 05:35:35,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522574558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:35,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 05:35:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670406225] [2021-11-19 05:35:35,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:35:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:35:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:35,564 INFO L87 Difference]: Start difference. First operand 213 states and 333 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:35,667 INFO L93 Difference]: Finished difference Result 215 states and 335 transitions. [2021-11-19 05:35:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:35:35,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2021-11-19 05:35:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:35,671 INFO L225 Difference]: With dead ends: 215 [2021-11-19 05:35:35,671 INFO L226 Difference]: Without dead ends: 215 [2021-11-19 05:35:35,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:35,673 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:35,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 307 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-19 05:35:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-19 05:35:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-19 05:35:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 151 states have (on average 1.5894039735099337) internal successors, (240), 173 states have internal predecessors, (240), 22 states have call successors, (22), 17 states have call predecessors, (22), 21 states have return successors, (73), 24 states have call predecessors, (73), 21 states have call successors, (73) [2021-11-19 05:35:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 335 transitions. [2021-11-19 05:35:35,696 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 335 transitions. Word has length 12 [2021-11-19 05:35:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:35,697 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 335 transitions. [2021-11-19 05:35:35,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 335 transitions. [2021-11-19 05:35:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:35:35,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:35,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:35,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:35,911 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 832840430, now seen corresponding path program 1 times [2021-11-19 05:35:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:35,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847131430] [2021-11-19 05:35:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:35,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:35,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:35,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 05:35:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:35:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:36,145 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:35:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-19 05:35:36,152 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:36,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 05:35:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:36,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:36,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:36,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-11-19 05:35:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:36,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:36,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847131430] [2021-11-19 05:35:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847131430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:36,557 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 05:35:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115306772] [2021-11-19 05:35:36,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:35:36,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:35:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:36,559 INFO L87 Difference]: Start difference. First operand 215 states and 335 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:36,689 INFO L93 Difference]: Finished difference Result 216 states and 336 transitions. [2021-11-19 05:35:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:35:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-19 05:35:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:36,693 INFO L225 Difference]: With dead ends: 216 [2021-11-19 05:35:36,693 INFO L226 Difference]: Without dead ends: 216 [2021-11-19 05:35:36,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:36,695 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 3 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:36,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 336 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-11-19 05:35:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-19 05:35:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-19 05:35:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 152 states have (on average 1.5855263157894737) internal successors, (241), 174 states have internal predecessors, (241), 22 states have call successors, (22), 17 states have call predecessors, (22), 21 states have return successors, (73), 24 states have call predecessors, (73), 21 states have call successors, (73) [2021-11-19 05:35:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 336 transitions. [2021-11-19 05:35:36,720 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 336 transitions. Word has length 13 [2021-11-19 05:35:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:36,720 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 336 transitions. [2021-11-19 05:35:36,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 336 transitions. [2021-11-19 05:35:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:35:36,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:36,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:36,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:36,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:36,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash -682381987, now seen corresponding path program 1 times [2021-11-19 05:35:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680207606] [2021-11-19 05:35:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:36,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:36,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:36,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 05:35:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:35:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:37,182 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:35:37,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-19 05:35:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-19 05:35:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:37,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-19 05:35:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:38,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:38,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680207606] [2021-11-19 05:35:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680207606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:38,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:35:38,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102820881] [2021-11-19 05:35:38,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:38,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:35:38,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:35:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:38,304 INFO L87 Difference]: Start difference. First operand 216 states and 336 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:38,536 INFO L93 Difference]: Finished difference Result 222 states and 344 transitions. [2021-11-19 05:35:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:35:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-19 05:35:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:38,544 INFO L225 Difference]: With dead ends: 222 [2021-11-19 05:35:38,544 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 05:35:38,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:38,546 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 10 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:38,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 338 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2021-11-19 05:35:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 05:35:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-11-19 05:35:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 157 states have (on average 1.5796178343949046) internal successors, (248), 179 states have internal predecessors, (248), 22 states have call successors, (22), 17 states have call predecessors, (22), 21 states have return successors, (73), 24 states have call predecessors, (73), 21 states have call successors, (73) [2021-11-19 05:35:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 343 transitions. [2021-11-19 05:35:38,572 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 343 transitions. Word has length 18 [2021-11-19 05:35:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:38,573 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 343 transitions. [2021-11-19 05:35:38,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 343 transitions. [2021-11-19 05:35:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 05:35:38,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:38,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:38,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:38,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:38,790 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 320994995, now seen corresponding path program 1 times [2021-11-19 05:35:38,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:38,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936200321] [2021-11-19 05:35:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:38,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:38,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:38,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 05:35:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:35:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:39,059 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:35:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-19 05:35:39,094 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:35:39,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-19 05:35:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-19 05:35:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-19 05:35:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:39,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-19 05:35:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-19 05:35:40,237 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2021-11-19 05:35:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:40,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:40,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936200321] [2021-11-19 05:35:40,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936200321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:40,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:40,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:35:40,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982325085] [2021-11-19 05:35:40,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:40,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:35:40,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:35:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:40,247 INFO L87 Difference]: Start difference. First operand 221 states and 343 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:42,043 INFO L93 Difference]: Finished difference Result 326 states and 440 transitions. [2021-11-19 05:35:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:35:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-19 05:35:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:42,049 INFO L225 Difference]: With dead ends: 326 [2021-11-19 05:35:42,049 INFO L226 Difference]: Without dead ends: 326 [2021-11-19 05:35:42,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:35:42,050 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 314 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:42,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 565 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 364 Invalid, 0 Unknown, 86 Unchecked, 1.3s Time] [2021-11-19 05:35:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-19 05:35:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 243. [2021-11-19 05:35:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 177 states have (on average 1.576271186440678) internal successors, (279), 200 states have internal predecessors, (279), 23 states have call successors, (23), 17 states have call predecessors, (23), 22 states have return successors, (81), 25 states have call predecessors, (81), 22 states have call successors, (81) [2021-11-19 05:35:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 383 transitions. [2021-11-19 05:35:42,076 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 383 transitions. Word has length 19 [2021-11-19 05:35:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:42,076 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 383 transitions. [2021-11-19 05:35:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 383 transitions. [2021-11-19 05:35:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:35:42,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:42,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:42,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:42,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:42,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1360910367, now seen corresponding path program 1 times [2021-11-19 05:35:42,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:42,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428977365] [2021-11-19 05:35:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:42,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:42,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:42,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:42,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 05:35:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:35:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:42,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:42,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428977365] [2021-11-19 05:35:42,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428977365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:42,530 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:42,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 05:35:42,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765024458] [2021-11-19 05:35:42,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:42,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:42,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:42,532 INFO L87 Difference]: Start difference. First operand 243 states and 383 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:42,615 INFO L93 Difference]: Finished difference Result 255 states and 393 transitions. [2021-11-19 05:35:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-19 05:35:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:42,619 INFO L225 Difference]: With dead ends: 255 [2021-11-19 05:35:42,619 INFO L226 Difference]: Without dead ends: 255 [2021-11-19 05:35:42,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:42,620 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:42,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 127 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-19 05:35:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2021-11-19 05:35:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 184 states have (on average 1.559782608695652) internal successors, (287), 209 states have internal predecessors, (287), 23 states have call successors, (23), 17 states have call predecessors, (23), 24 states have return successors, (83), 25 states have call predecessors, (83), 22 states have call successors, (83) [2021-11-19 05:35:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 393 transitions. [2021-11-19 05:35:42,637 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 393 transitions. Word has length 20 [2021-11-19 05:35:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:42,637 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 393 transitions. [2021-11-19 05:35:42,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 393 transitions. [2021-11-19 05:35:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:35:42,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:42,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:42,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:42,851 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1416193946, now seen corresponding path program 1 times [2021-11-19 05:35:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:42,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004260328] [2021-11-19 05:35:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:42,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:42,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:42,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 05:35:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:35:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:43,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 05:35:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:43,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:43,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-19 05:35:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-19 05:35:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:43,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:43,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004260328] [2021-11-19 05:35:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004260328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:43,534 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:43,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 05:35:43,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664458184] [2021-11-19 05:35:43,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:35:43,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:35:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:43,536 INFO L87 Difference]: Start difference. First operand 252 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:44,355 INFO L93 Difference]: Finished difference Result 583 states and 895 transitions. [2021-11-19 05:35:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:35:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 05:35:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:44,364 INFO L225 Difference]: With dead ends: 583 [2021-11-19 05:35:44,364 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 05:35:44,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:35:44,366 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 204 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:44,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 462 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 05:35:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 05:35:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 482. [2021-11-19 05:35:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 368 states have (on average 1.5923913043478262) internal successors, (586), 400 states have internal predecessors, (586), 42 states have call successors, (42), 33 states have call predecessors, (42), 51 states have return successors, (180), 48 states have call predecessors, (180), 41 states have call successors, (180) [2021-11-19 05:35:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 808 transitions. [2021-11-19 05:35:44,406 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 808 transitions. Word has length 20 [2021-11-19 05:35:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:44,408 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 808 transitions. [2021-11-19 05:35:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 808 transitions. [2021-11-19 05:35:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 05:35:44,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:44,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:44,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:44,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:44,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash -761451467, now seen corresponding path program 1 times [2021-11-19 05:35:44,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:44,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858228226] [2021-11-19 05:35:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:44,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:44,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:44,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:44,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 05:35:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:35:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:44,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:44,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858228226] [2021-11-19 05:35:44,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858228226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:44,879 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:44,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 05:35:44,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127413218] [2021-11-19 05:35:44,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:44,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:44,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:44,881 INFO L87 Difference]: Start difference. First operand 482 states and 808 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:45,038 INFO L93 Difference]: Finished difference Result 490 states and 806 transitions. [2021-11-19 05:35:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-19 05:35:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:45,044 INFO L225 Difference]: With dead ends: 490 [2021-11-19 05:35:45,044 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 05:35:45,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:45,045 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:45,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 05:35:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 483. [2021-11-19 05:35:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 369 states have (on average 1.5718157181571815) internal successors, (580), 401 states have internal predecessors, (580), 42 states have call successors, (42), 33 states have call predecessors, (42), 51 states have return successors, (180), 48 states have call predecessors, (180), 41 states have call successors, (180) [2021-11-19 05:35:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 802 transitions. [2021-11-19 05:35:45,074 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 802 transitions. Word has length 21 [2021-11-19 05:35:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 802 transitions. [2021-11-19 05:35:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 802 transitions. [2021-11-19 05:35:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:35:45,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:45,076 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] [2021-11-19 05:35:45,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:45,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:45,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting c2Err3ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 774207653, now seen corresponding path program 1 times [2021-11-19 05:35:45,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:45,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979705004] [2021-11-19 05:35:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:45,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:45,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:45,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 05:35:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:35:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:45,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:45,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:45,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979705004] [2021-11-19 05:35:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979705004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:45,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:45,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 05:35:45,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487703789] [2021-11-19 05:35:45,558 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:45,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:45,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:45,560 INFO L87 Difference]: Start difference. First operand 483 states and 802 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:45,571 INFO L93 Difference]: Finished difference Result 403 states and 656 transitions. [2021-11-19 05:35:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-19 05:35:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:45,575 INFO L225 Difference]: With dead ends: 403 [2021-11-19 05:35:45,575 INFO L226 Difference]: Without dead ends: 403 [2021-11-19 05:35:45,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:45,577 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:45,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-19 05:35:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2021-11-19 05:35:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 302 states have (on average 1.4966887417218544) internal successors, (452), 327 states have internal predecessors, (452), 39 states have call successors, (39), 30 states have call predecessors, (39), 47 states have return successors, (165), 45 states have call predecessors, (165), 38 states have call successors, (165) [2021-11-19 05:35:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 656 transitions. [2021-11-19 05:35:45,600 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 656 transitions. Word has length 23 [2021-11-19 05:35:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 656 transitions. [2021-11-19 05:35:45,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 656 transitions. [2021-11-19 05:35:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:35:45,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:45,605 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] [2021-11-19 05:35:45,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:45,818 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 774207429, now seen corresponding path program 1 times [2021-11-19 05:35:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:45,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190888190] [2021-11-19 05:35:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:45,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:45,819 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:45,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 05:35:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:35:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:46,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:46,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:46,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190888190] [2021-11-19 05:35:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190888190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:46,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:46,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 05:35:46,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319345934] [2021-11-19 05:35:46,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:46,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:46,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:46,104 INFO L87 Difference]: Start difference. First operand 403 states and 656 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:46,132 INFO L93 Difference]: Finished difference Result 478 states and 745 transitions. [2021-11-19 05:35:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-19 05:35:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:46,137 INFO L225 Difference]: With dead ends: 478 [2021-11-19 05:35:46,138 INFO L226 Difference]: Without dead ends: 478 [2021-11-19 05:35:46,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:46,139 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 48 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:46,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 122 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-19 05:35:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 455. [2021-11-19 05:35:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 345 states have (on average 1.4840579710144928) internal successors, (512), 367 states have internal predecessors, (512), 42 states have call successors, (42), 34 states have call predecessors, (42), 53 states have return successors, (167), 53 states have call predecessors, (167), 41 states have call successors, (167) [2021-11-19 05:35:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 721 transitions. [2021-11-19 05:35:46,165 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 721 transitions. Word has length 23 [2021-11-19 05:35:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:46,165 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 721 transitions. [2021-11-19 05:35:46,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 721 transitions. [2021-11-19 05:35:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 05:35:46,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:46,167 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] [2021-11-19 05:35:46,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:46,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:46,381 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting c2Err1ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1769373397, now seen corresponding path program 1 times [2021-11-19 05:35:46,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:46,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397491422] [2021-11-19 05:35:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:46,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:46,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:46,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 05:35:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:46,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:35:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:46,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:46,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:46,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397491422] [2021-11-19 05:35:46,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397491422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:46,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:46,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 05:35:46,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417545754] [2021-11-19 05:35:46,821 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:46,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:35:46,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:35:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:35:46,823 INFO L87 Difference]: Start difference. First operand 455 states and 721 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:46,964 INFO L93 Difference]: Finished difference Result 484 states and 724 transitions. [2021-11-19 05:35:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:35:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-19 05:35:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:46,969 INFO L225 Difference]: With dead ends: 484 [2021-11-19 05:35:46,969 INFO L226 Difference]: Without dead ends: 484 [2021-11-19 05:35:46,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:35:46,970 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 107 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:46,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 158 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-19 05:35:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2021-11-19 05:35:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 347 states have (on average 1.4524495677233429) internal successors, (504), 369 states have internal predecessors, (504), 42 states have call successors, (42), 34 states have call predecessors, (42), 53 states have return successors, (167), 53 states have call predecessors, (167), 41 states have call successors, (167) [2021-11-19 05:35:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 713 transitions. [2021-11-19 05:35:46,995 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 713 transitions. Word has length 24 [2021-11-19 05:35:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:46,996 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 713 transitions. [2021-11-19 05:35:46,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 713 transitions. [2021-11-19 05:35:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:35:47,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:47,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:47,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:47,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:47,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:47,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1420785925, now seen corresponding path program 1 times [2021-11-19 05:35:47,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:47,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501620298] [2021-11-19 05:35:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:47,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:47,220 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:47,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 05:35:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:35:47,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:47,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:47,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:47,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501620298] [2021-11-19 05:35:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501620298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:47,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:47,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-19 05:35:47,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947200933] [2021-11-19 05:35:47,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:47,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:35:47,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:35:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:47,600 INFO L87 Difference]: Start difference. First operand 457 states and 713 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:47,753 INFO L93 Difference]: Finished difference Result 505 states and 781 transitions. [2021-11-19 05:35:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:35:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (3), 1 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 25 [2021-11-19 05:35:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:47,760 INFO L225 Difference]: With dead ends: 505 [2021-11-19 05:35:47,760 INFO L226 Difference]: Without dead ends: 505 [2021-11-19 05:35:47,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:47,763 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 46 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:47,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 352 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-19 05:35:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 444. [2021-11-19 05:35:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 335 states have (on average 1.3850746268656717) internal successors, (464), 358 states have internal predecessors, (464), 43 states have call successors, (43), 34 states have call predecessors, (43), 51 states have return successors, (157), 51 states have call predecessors, (157), 42 states have call successors, (157) [2021-11-19 05:35:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 664 transitions. [2021-11-19 05:35:47,802 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 664 transitions. Word has length 25 [2021-11-19 05:35:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:47,802 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 664 transitions. [2021-11-19 05:35:47,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 664 transitions. [2021-11-19 05:35:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 05:35:47,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:47,804 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:47,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:48,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:48,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -583728472, now seen corresponding path program 1 times [2021-11-19 05:35:48,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:48,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801405221] [2021-11-19 05:35:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:48,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:48,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:48,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 05:35:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:35:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:48,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 05:35:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:35:48,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:48,470 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-19 05:35:48,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-19 05:35:48,494 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-19 05:35:48,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-19 05:35:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:35:48,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:48,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801405221] [2021-11-19 05:35:48,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801405221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:48,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:48,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-19 05:35:48,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493652880] [2021-11-19 05:35:48,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:48,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:35:48,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:35:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:48,519 INFO L87 Difference]: Start difference. First operand 444 states and 664 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:49,086 INFO L93 Difference]: Finished difference Result 512 states and 785 transitions. [2021-11-19 05:35:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:35:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 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 31 [2021-11-19 05:35:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:49,092 INFO L225 Difference]: With dead ends: 512 [2021-11-19 05:35:49,092 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 05:35:49,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:35:49,093 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 94 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:49,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 262 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:35:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 05:35:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 449. [2021-11-19 05:35:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 340 states have (on average 1.3764705882352941) internal successors, (468), 363 states have internal predecessors, (468), 43 states have call successors, (43), 34 states have call predecessors, (43), 51 states have return successors, (157), 51 states have call predecessors, (157), 42 states have call successors, (157) [2021-11-19 05:35:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 668 transitions. [2021-11-19 05:35:49,122 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 668 transitions. Word has length 31 [2021-11-19 05:35:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:49,122 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 668 transitions. [2021-11-19 05:35:49,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 668 transitions. [2021-11-19 05:35:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:35:49,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:49,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:49,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:49,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:49,341 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1457748217, now seen corresponding path program 1 times [2021-11-19 05:35:49,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:49,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647391413] [2021-11-19 05:35:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:49,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:49,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:49,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 05:35:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:35:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:49,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:49,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:49,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647391413] [2021-11-19 05:35:49,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647391413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:49,704 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:49,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 05:35:49,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248690497] [2021-11-19 05:35:49,705 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:49,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:35:49,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:35:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:49,706 INFO L87 Difference]: Start difference. First operand 449 states and 668 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:35:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:49,712 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2021-11-19 05:35:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:35:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-19 05:35:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:49,715 INFO L225 Difference]: With dead ends: 265 [2021-11-19 05:35:49,716 INFO L226 Difference]: Without dead ends: 265 [2021-11-19 05:35:49,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:35:49,718 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:49,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-19 05:35:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2021-11-19 05:35:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 195 states have (on average 1.353846153846154) internal successors, (264), 211 states have internal predecessors, (264), 25 states have call successors, (25), 21 states have call predecessors, (25), 25 states have return successors, (69), 27 states have call predecessors, (69), 24 states have call successors, (69) [2021-11-19 05:35:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 358 transitions. [2021-11-19 05:35:49,730 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 358 transitions. Word has length 33 [2021-11-19 05:35:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:49,731 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 358 transitions. [2021-11-19 05:35:49,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:35:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 358 transitions. [2021-11-19 05:35:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:35:49,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:49,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:49,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:49,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:49,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1677657770, now seen corresponding path program 1 times [2021-11-19 05:35:49,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:49,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298760561] [2021-11-19 05:35:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:49,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:49,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:49,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 05:35:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:35:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:50,141 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:35:50,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-19 05:35:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:35:50,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:35:50,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:35:50,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298760561] [2021-11-19 05:35:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298760561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:50,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:50,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:35:50,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855652257] [2021-11-19 05:35:50,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:50,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:35:50,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:35:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:35:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:35:50,748 INFO L87 Difference]: Start difference. First operand 260 states and 358 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:35:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:51,053 INFO L93 Difference]: Finished difference Result 368 states and 487 transitions. [2021-11-19 05:35:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:35:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-11-19 05:35:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:51,060 INFO L225 Difference]: With dead ends: 368 [2021-11-19 05:35:51,060 INFO L226 Difference]: Without dead ends: 368 [2021-11-19 05:35:51,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:35:51,061 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 77 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:51,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 286 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2021-11-19 05:35:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-19 05:35:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 346. [2021-11-19 05:35:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 274 states have (on average 1.3503649635036497) internal successors, (370), 291 states have internal predecessors, (370), 27 states have call successors, (27), 25 states have call predecessors, (27), 30 states have return successors, (75), 29 states have call predecessors, (75), 26 states have call successors, (75) [2021-11-19 05:35:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 472 transitions. [2021-11-19 05:35:51,079 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 472 transitions. Word has length 33 [2021-11-19 05:35:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:51,079 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 472 transitions. [2021-11-19 05:35:51,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:35:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 472 transitions. [2021-11-19 05:35:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 05:35:51,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:51,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:51,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:51,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:35:51,294 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:35:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1915451196, now seen corresponding path program 1 times [2021-11-19 05:35:51,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:35:51,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147534067] [2021-11-19 05:35:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:51,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:35:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:35:51,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:35:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 05:35:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:51,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 05:35:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:51,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:35:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:35:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:35:52,000 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:35:52,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:35:52,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:35:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-19 05:35:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:52,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:38,555 WARN L227 SmtUtils]: Spent 13.02s on a formula simplification. DAG size of input: 65 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:36:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:42,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:42,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147534067] [2021-11-19 05:36:42,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147534067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:42,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:36:42,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-11-19 05:36:42,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294070331] [2021-11-19 05:36:42,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:42,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:36:42,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:36:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=130, Unknown=22, NotChecked=0, Total=210 [2021-11-19 05:36:42,337 INFO L87 Difference]: Start difference. First operand 346 states and 472 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:36:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:42,727 INFO L93 Difference]: Finished difference Result 400 states and 544 transitions. [2021-11-19 05:36:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:36:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2021-11-19 05:36:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:42,731 INFO L225 Difference]: With dead ends: 400 [2021-11-19 05:36:42,731 INFO L226 Difference]: Without dead ends: 400 [2021-11-19 05:36:42,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=68, Invalid=150, Unknown=22, NotChecked=0, Total=240 [2021-11-19 05:36:42,732 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 125 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:42,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 273 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 246 Unchecked, 0.3s Time] [2021-11-19 05:36:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-19 05:36:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 382. [2021-11-19 05:36:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 300 states have (on average 1.33) internal successors, (399), 317 states have internal predecessors, (399), 31 states have call successors, (31), 29 states have call predecessors, (31), 36 states have return successors, (90), 35 states have call predecessors, (90), 30 states have call successors, (90) [2021-11-19 05:36:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 520 transitions. [2021-11-19 05:36:42,748 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 520 transitions. Word has length 35 [2021-11-19 05:36:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:42,748 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 520 transitions. [2021-11-19 05:36:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:36:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 520 transitions. [2021-11-19 05:36:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 05:36:42,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:42,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:42,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:42,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:42,962 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:42,963 INFO L85 PathProgramCache]: Analyzing trace with hash 467783434, now seen corresponding path program 1 times [2021-11-19 05:36:42,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:42,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320686850] [2021-11-19 05:36:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:42,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:42,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:42,965 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:43,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 05:36:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:36:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:43,183 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:36:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-19 05:36:43,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:36:43,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-19 05:36:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:36:43,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:43,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:36:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2021-11-19 05:36:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:36:43,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:43,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320686850] [2021-11-19 05:36:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320686850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:43,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:36:43,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:36:43,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742078676] [2021-11-19 05:36:43,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:43,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:36:43,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:43,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:36:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:36:43,838 INFO L87 Difference]: Start difference. First operand 382 states and 520 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:36:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:44,493 INFO L93 Difference]: Finished difference Result 414 states and 544 transitions. [2021-11-19 05:36:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:36:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-11-19 05:36:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:44,496 INFO L225 Difference]: With dead ends: 414 [2021-11-19 05:36:44,496 INFO L226 Difference]: Without dead ends: 414 [2021-11-19 05:36:44,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:36:44,497 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 106 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:44,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 256 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 174 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2021-11-19 05:36:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-19 05:36:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 392. [2021-11-19 05:36:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 307 states have (on average 1.3127035830618892) internal successors, (403), 325 states have internal predecessors, (403), 32 states have call successors, (32), 29 states have call predecessors, (32), 38 states have return successors, (88), 37 states have call predecessors, (88), 31 states have call successors, (88) [2021-11-19 05:36:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 523 transitions. [2021-11-19 05:36:44,516 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 523 transitions. Word has length 34 [2021-11-19 05:36:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 523 transitions. [2021-11-19 05:36:44,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:36:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 523 transitions. [2021-11-19 05:36:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 05:36:44,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:44,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:44,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:44,730 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1081960223, now seen corresponding path program 1 times [2021-11-19 05:36:44,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:44,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021394537] [2021-11-19 05:36:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:44,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:44,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:44,732 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 05:36:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:36:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:45,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:36:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:36:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:45,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:45,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021394537] [2021-11-19 05:36:45,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021394537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:45,870 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:45,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2021-11-19 05:36:45,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445697722] [2021-11-19 05:36:45,871 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:45,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:36:45,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:36:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:36:45,872 INFO L87 Difference]: Start difference. First operand 392 states and 523 transitions. Second operand has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 11 states have internal predecessors, (49), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 05:36:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:46,267 INFO L93 Difference]: Finished difference Result 429 states and 587 transitions. [2021-11-19 05:36:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:36:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 11 states have internal predecessors, (49), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2021-11-19 05:36:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:46,270 INFO L225 Difference]: With dead ends: 429 [2021-11-19 05:36:46,270 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 05:36:46,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:36:46,271 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 91 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:46,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 326 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:36:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 05:36:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 408. [2021-11-19 05:36:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 315 states have (on average 1.3174603174603174) internal successors, (415), 339 states have internal predecessors, (415), 38 states have call successors, (38), 29 states have call predecessors, (38), 40 states have return successors, (106), 39 states have call predecessors, (106), 37 states have call successors, (106) [2021-11-19 05:36:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 559 transitions. [2021-11-19 05:36:46,290 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 559 transitions. Word has length 36 [2021-11-19 05:36:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:46,290 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 559 transitions. [2021-11-19 05:36:46,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.444444444444445) internal successors, (49), 11 states have internal predecessors, (49), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 05:36:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 559 transitions. [2021-11-19 05:36:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:36:46,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:46,292 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:46,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 05:36:46,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:46,503 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash 148770746, now seen corresponding path program 1 times [2021-11-19 05:36:46,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:46,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733886873] [2021-11-19 05:36:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:46,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:46,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:46,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 05:36:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:36:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-19 05:36:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:47,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 05:36:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 05:36:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:48,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:48,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733886873] [2021-11-19 05:36:48,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733886873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:48,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:36:48,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-19 05:36:48,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874141374] [2021-11-19 05:36:48,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:48,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:36:48,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:36:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:36:48,203 INFO L87 Difference]: Start difference. First operand 408 states and 559 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 13 states have internal predecessors, (65), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:36:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:49,469 INFO L93 Difference]: Finished difference Result 502 states and 622 transitions. [2021-11-19 05:36:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:36:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 13 states have internal predecessors, (65), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2021-11-19 05:36:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:49,474 INFO L225 Difference]: With dead ends: 502 [2021-11-19 05:36:49,474 INFO L226 Difference]: Without dead ends: 480 [2021-11-19 05:36:49,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:36:49,475 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 386 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:49,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 500 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:36:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-19 05:36:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 401. [2021-11-19 05:36:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 314 states have (on average 1.3184713375796178) internal successors, (414), 336 states have internal predecessors, (414), 33 states have call successors, (33), 31 states have call predecessors, (33), 39 states have return successors, (79), 33 states have call predecessors, (79), 30 states have call successors, (79) [2021-11-19 05:36:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 526 transitions. [2021-11-19 05:36:49,490 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 526 transitions. Word has length 44 [2021-11-19 05:36:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 526 transitions. [2021-11-19 05:36:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 13 states have internal predecessors, (65), 7 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:36:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 526 transitions. [2021-11-19 05:36:49,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 05:36:49,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:49,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:49,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:49,703 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1263723404, now seen corresponding path program 1 times [2021-11-19 05:36:49,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:49,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648966411] [2021-11-19 05:36:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:49,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:49,706 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:49,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 05:36:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 05:36:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:50,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:50,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:50,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648966411] [2021-11-19 05:36:50,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648966411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:50,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:50,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 05:36:50,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861258436] [2021-11-19 05:36:50,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:36:50,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:36:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:36:50,993 INFO L87 Difference]: Start difference. First operand 401 states and 526 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:36:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:51,221 INFO L93 Difference]: Finished difference Result 379 states and 488 transitions. [2021-11-19 05:36:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:36:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-11-19 05:36:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:51,224 INFO L225 Difference]: With dead ends: 379 [2021-11-19 05:36:51,224 INFO L226 Difference]: Without dead ends: 379 [2021-11-19 05:36:51,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:36:51,225 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 116 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:51,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 160 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:36:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-19 05:36:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 367. [2021-11-19 05:36:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 288 states have (on average 1.3194444444444444) internal successors, (380), 310 states have internal predecessors, (380), 31 states have call successors, (31), 29 states have call predecessors, (31), 33 states have return successors, (62), 27 states have call predecessors, (62), 28 states have call successors, (62) [2021-11-19 05:36:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 473 transitions. [2021-11-19 05:36:51,238 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 473 transitions. Word has length 38 [2021-11-19 05:36:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:51,238 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 473 transitions. [2021-11-19 05:36:51,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:36:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 473 transitions. [2021-11-19 05:36:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 05:36:51,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:51,239 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:51,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:51,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:51,451 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2089366209, now seen corresponding path program 2 times [2021-11-19 05:36:51,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:51,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002360073] [2021-11-19 05:36:51,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:36:51,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:51,453 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 05:36:51,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:36:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:36:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:36:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-19 05:36:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:51,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:52,184 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-11-19 05:36:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-19 05:36:52,203 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-19 05:36:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 05:36:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:52,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:36:52,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002360073] [2021-11-19 05:36:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002360073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:52,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:36:52,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-19 05:36:52,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724327096] [2021-11-19 05:36:52,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:52,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:36:52,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:36:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:36:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:36:52,250 INFO L87 Difference]: Start difference. First operand 367 states and 473 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:36:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:53,133 INFO L93 Difference]: Finished difference Result 433 states and 538 transitions. [2021-11-19 05:36:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:36:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 2 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 39 [2021-11-19 05:36:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:53,136 INFO L225 Difference]: With dead ends: 433 [2021-11-19 05:36:53,136 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 05:36:53,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:36:53,138 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 185 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:53,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 372 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 05:36:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 05:36:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 388. [2021-11-19 05:36:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 304 states have (on average 1.319078947368421) internal successors, (401), 327 states have internal predecessors, (401), 33 states have call successors, (33), 31 states have call predecessors, (33), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:36:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 503 transitions. [2021-11-19 05:36:53,151 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 503 transitions. Word has length 39 [2021-11-19 05:36:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:53,151 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 503 transitions. [2021-11-19 05:36:53,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:36:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 503 transitions. [2021-11-19 05:36:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:36:53,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:53,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:53,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:53,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:36:53,364 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:36:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -772397719, now seen corresponding path program 1 times [2021-11-19 05:36:53,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:36:53,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572585506] [2021-11-19 05:36:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:53,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:36:53,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:36:53,366 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:36:53,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 05:36:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 05:36:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:53,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:36:53,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:36:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 05:36:53,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:36:54,034 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:36:54,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:36:54,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:36:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-19 05:36:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:36:54,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:37:08,420 WARN L227 SmtUtils]: Spent 6.92s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:37:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2021-11-19 05:37:20,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:37:20,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 124 [2021-11-19 05:37:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:37:55,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:37:55,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572585506] [2021-11-19 05:37:55,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572585506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:37:55,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:37:55,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-19 05:37:55,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284016541] [2021-11-19 05:37:55,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:37:55,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:37:55,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:37:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:37:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=109, Unknown=5, NotChecked=0, Total=156 [2021-11-19 05:37:55,279 INFO L87 Difference]: Start difference. First operand 388 states and 503 transitions. Second operand has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:37:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:55,671 INFO L93 Difference]: Finished difference Result 393 states and 504 transitions. [2021-11-19 05:37:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:37:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2021-11-19 05:37:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:55,674 INFO L225 Difference]: With dead ends: 393 [2021-11-19 05:37:55,674 INFO L226 Difference]: Without dead ends: 393 [2021-11-19 05:37:55,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=78, Invalid=189, Unknown=5, NotChecked=0, Total=272 [2021-11-19 05:37:55,675 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 60 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:55,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 310 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2021-11-19 05:37:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-19 05:37:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 388. [2021-11-19 05:37:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 304 states have (on average 1.3157894736842106) internal successors, (400), 327 states have internal predecessors, (400), 33 states have call successors, (33), 31 states have call predecessors, (33), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:37:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 502 transitions. [2021-11-19 05:37:55,689 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 502 transitions. Word has length 41 [2021-11-19 05:37:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:55,689 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 502 transitions. [2021-11-19 05:37:55,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:37:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 502 transitions. [2021-11-19 05:37:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:37:55,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:55,691 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:55,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 05:37:55,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:37:55,904 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:37:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 755566219, now seen corresponding path program 1 times [2021-11-19 05:37:55,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:37:55,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90857663] [2021-11-19 05:37:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:55,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:37:55,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:37:55,908 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:37:55,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 05:37:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:37:56,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:37:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:37:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:37:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:37:56,607 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:37:56,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-19 05:37:56,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:37:56,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 05:37:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:37:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:38:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:35,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:38:35,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90857663] [2021-11-19 05:38:35,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90857663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:38:35,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:38:35,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-11-19 05:38:35,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370404915] [2021-11-19 05:38:35,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:38:35,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:38:35,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:38:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:38:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=202, Unknown=30, NotChecked=0, Total=306 [2021-11-19 05:38:35,818 INFO L87 Difference]: Start difference. First operand 388 states and 502 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 14 states have internal predecessors, (66), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:38:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:36,052 INFO L93 Difference]: Finished difference Result 388 states and 501 transitions. [2021-11-19 05:38:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:38:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 14 states have internal predecessors, (66), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2021-11-19 05:38:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:36,056 INFO L225 Difference]: With dead ends: 388 [2021-11-19 05:38:36,056 INFO L226 Difference]: Without dead ends: 388 [2021-11-19 05:38:36,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=74, Invalid=202, Unknown=30, NotChecked=0, Total=306 [2021-11-19 05:38:36,057 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 37 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:36,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 352 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2021-11-19 05:38:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-19 05:38:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-19 05:38:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 304 states have (on average 1.3125) internal successors, (399), 327 states have internal predecessors, (399), 33 states have call successors, (33), 31 states have call predecessors, (33), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:38:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 501 transitions. [2021-11-19 05:38:36,070 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 501 transitions. Word has length 43 [2021-11-19 05:38:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 501 transitions. [2021-11-19 05:38:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 14 states have internal predecessors, (66), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:38:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 501 transitions. [2021-11-19 05:38:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:38:36,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:36,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:36,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 05:38:36,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:38:36,285 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr9REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:38:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash 755135370, now seen corresponding path program 1 times [2021-11-19 05:38:36,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:38:36,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483366400] [2021-11-19 05:38:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:36,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:38:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:38:36,286 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:38:36,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 05:38:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:38:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:38:36,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:38:36,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-19 05:38:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:37,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:38:37,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483366400] [2021-11-19 05:38:37,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483366400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:38:37,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:38:37,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 05:38:37,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276472002] [2021-11-19 05:38:37,804 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:38:37,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:38:37,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:38:37,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:38:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:38:37,805 INFO L87 Difference]: Start difference. First operand 388 states and 501 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:38:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:38,781 INFO L93 Difference]: Finished difference Result 406 states and 509 transitions. [2021-11-19 05:38:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:38:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-19 05:38:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:38,794 INFO L225 Difference]: With dead ends: 406 [2021-11-19 05:38:38,794 INFO L226 Difference]: Without dead ends: 406 [2021-11-19 05:38:38,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:38:38,795 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 95 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:38,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 209 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 05:38:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-19 05:38:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 387. [2021-11-19 05:38:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 326 states have internal predecessors, (391), 33 states have call successors, (33), 31 states have call predecessors, (33), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:38:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 493 transitions. [2021-11-19 05:38:38,807 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 493 transitions. Word has length 43 [2021-11-19 05:38:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:38,808 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 493 transitions. [2021-11-19 05:38:38,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:38:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 493 transitions. [2021-11-19 05:38:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 05:38:38,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:38,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:38,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 05:38:39,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:38:39,022 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:38:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1379100636, now seen corresponding path program 1 times [2021-11-19 05:38:39,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:38:39,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856045067] [2021-11-19 05:38:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:39,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:38:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:38:39,025 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:38:39,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 05:38:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:38:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-19 05:38:39,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-19 05:38:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:39,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:38:41,454 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-19 05:38:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-19 05:38:41,461 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-19 05:38:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-19 05:38:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:41,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:38:41,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856045067] [2021-11-19 05:38:41,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856045067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:38:41,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:38:41,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2021-11-19 05:38:41,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553865717] [2021-11-19 05:38:41,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:38:41,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:38:41,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:38:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:38:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:38:41,510 INFO L87 Difference]: Start difference. First operand 387 states and 493 transitions. Second operand has 11 states, 8 states have (on average 6.375) internal successors, (51), 11 states have internal predecessors, (51), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:38:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:41,956 INFO L93 Difference]: Finished difference Result 386 states and 483 transitions. [2021-11-19 05:38:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:38:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 6.375) internal successors, (51), 11 states have internal predecessors, (51), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-11-19 05:38:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:41,959 INFO L225 Difference]: With dead ends: 386 [2021-11-19 05:38:41,959 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 05:38:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:38:41,960 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 172 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:41,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 320 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:38:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 05:38:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2021-11-19 05:38:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 295 states have (on average 1.2779661016949153) internal successors, (377), 317 states have internal predecessors, (377), 31 states have call successors, (31), 29 states have call predecessors, (31), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:38:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 477 transitions. [2021-11-19 05:38:41,970 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 477 transitions. Word has length 49 [2021-11-19 05:38:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:41,971 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 477 transitions. [2021-11-19 05:38:41,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 6.375) internal successors, (51), 11 states have internal predecessors, (51), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:38:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 477 transitions. [2021-11-19 05:38:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 05:38:41,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:41,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:41,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 05:38:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:38:42,184 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting c1Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:38:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -110402540, now seen corresponding path program 1 times [2021-11-19 05:38:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:38:42,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886282010] [2021-11-19 05:38:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:42,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:38:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:38:42,186 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:38:42,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 05:38:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:38:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:42,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:38:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:42,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:38:42,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886282010] [2021-11-19 05:38:42,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886282010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:38:42,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:38:42,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-19 05:38:42,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699706746] [2021-11-19 05:38:42,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:38:42,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:38:42,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:38:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:38:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:38:42,777 INFO L87 Difference]: Start difference. First operand 376 states and 477 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:38:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:42,808 INFO L93 Difference]: Finished difference Result 374 states and 473 transitions. [2021-11-19 05:38:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:38:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-11-19 05:38:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:42,810 INFO L225 Difference]: With dead ends: 374 [2021-11-19 05:38:42,810 INFO L226 Difference]: Without dead ends: 374 [2021-11-19 05:38:42,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:38:42,811 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:42,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:38:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-19 05:38:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-19 05:38:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 295 states have (on average 1.264406779661017) internal successors, (373), 315 states have internal predecessors, (373), 31 states have call successors, (31), 29 states have call predecessors, (31), 36 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:38:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 473 transitions. [2021-11-19 05:38:42,823 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 473 transitions. Word has length 50 [2021-11-19 05:38:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 473 transitions. [2021-11-19 05:38:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:38:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 473 transitions. [2021-11-19 05:38:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 05:38:42,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:42,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:42,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 05:38:43,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:38:43,037 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:38:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1005522448, now seen corresponding path program 1 times [2021-11-19 05:38:43,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:38:43,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527901227] [2021-11-19 05:38:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:43,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:38:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:38:43,038 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:38:43,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 05:38:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:38:43,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:38:43,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:38:43,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:38:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 05:38:43,678 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:38:43,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:38:43,685 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:38:43,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-19 05:38:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:38:44,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:16,522 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_c1_~x~0.base_125 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse0 (select (store |c_old(#length)| v_c1_~x~0.base_125 (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| v_c1_~x~0.base_125))))) (forall ((v_c1_~x~0.base_128 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_c1_~x~0.base_128)))))))))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse1 (select (store |c_#length| v_c1_~x~0.base_128 (_ bv1 32)) |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1))))) (forall ((|v_old(#valid)_BEFORE_CALL_14| (Array (_ BitVec 32) (_ BitVec 1))) (|v_old(#length)_BEFORE_CALL_14| (Array (_ BitVec 32) (_ BitVec 32)))) (exists ((v_c1_~x~0.base_119 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_14| v_c1_~x~0.base_119)))))) (let ((.cse2 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse2 (select (store |v_old(#length)_BEFORE_CALL_14| v_c1_~x~0.base_119 (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse2)))))))) is different from true [2021-11-19 05:39:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:35,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:39:35,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527901227] [2021-11-19 05:39:35,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527901227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:35,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:39:35,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-11-19 05:39:35,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635625445] [2021-11-19 05:39:35,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:35,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:39:35,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:39:35,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:39:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=180, Unknown=26, NotChecked=30, Total=306 [2021-11-19 05:39:35,259 INFO L87 Difference]: Start difference. First operand 374 states and 473 transitions. Second operand has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:39:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:35,569 INFO L93 Difference]: Finished difference Result 388 states and 486 transitions. [2021-11-19 05:39:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:39:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2021-11-19 05:39:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:35,573 INFO L225 Difference]: With dead ends: 388 [2021-11-19 05:39:35,573 INFO L226 Difference]: Without dead ends: 388 [2021-11-19 05:39:35,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=70, Invalid=180, Unknown=26, NotChecked=30, Total=306 [2021-11-19 05:39:35,574 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 58 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:35,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 302 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 262 Unchecked, 0.3s Time] [2021-11-19 05:39:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-19 05:39:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-19 05:39:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 308 states have (on average 1.2532467532467533) internal successors, (386), 329 states have internal predecessors, (386), 31 states have call successors, (31), 29 states have call predecessors, (31), 37 states have return successors, (69), 29 states have call predecessors, (69), 30 states have call successors, (69) [2021-11-19 05:39:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 486 transitions. [2021-11-19 05:39:35,585 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 486 transitions. Word has length 49 [2021-11-19 05:39:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:35,586 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 486 transitions. [2021-11-19 05:39:35,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 8 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 05:39:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 486 transitions. [2021-11-19 05:39:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:39:35,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:35,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:35,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 05:39:35,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:39:35,800 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting c1Err1ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:39:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 872488621, now seen corresponding path program 1 times [2021-11-19 05:39:35,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:39:35,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452304336] [2021-11-19 05:39:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:35,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:39:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:39:35,803 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:39:35,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 05:39:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:39:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:36,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:36,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:39:36,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452304336] [2021-11-19 05:39:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452304336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:36,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:39:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-11-19 05:39:36,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670031575] [2021-11-19 05:39:36,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:36,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:39:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:39:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:39:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:39:36,768 INFO L87 Difference]: Start difference. First operand 388 states and 486 transitions. Second operand has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 05:39:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:36,957 INFO L93 Difference]: Finished difference Result 355 states and 423 transitions. [2021-11-19 05:39:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:39:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-11-19 05:39:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:36,960 INFO L225 Difference]: With dead ends: 355 [2021-11-19 05:39:36,960 INFO L226 Difference]: Without dead ends: 355 [2021-11-19 05:39:36,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:39:36,960 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:36,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:39:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-19 05:39:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 318. [2021-11-19 05:39:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 256 states have (on average 1.23046875) internal successors, (315), 273 states have internal predecessors, (315), 23 states have call successors, (23), 21 states have call predecessors, (23), 29 states have return successors, (41), 23 states have call predecessors, (41), 22 states have call successors, (41) [2021-11-19 05:39:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 379 transitions. [2021-11-19 05:39:36,971 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 379 transitions. Word has length 51 [2021-11-19 05:39:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:36,971 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 379 transitions. [2021-11-19 05:39:36,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 05:39:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 379 transitions. [2021-11-19 05:39:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 05:39:36,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:36,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:36,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-19 05:39:37,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:39:37,185 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting c1Err2ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:39:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1277343542, now seen corresponding path program 1 times [2021-11-19 05:39:37,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:39:37,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112983581] [2021-11-19 05:39:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:37,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:39:37,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:39:37,188 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:39:37,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 05:39:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:39:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:39:37,575 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-19 05:39:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-19 05:39:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:37,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:39:37,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112983581] [2021-11-19 05:39:37,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112983581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:37,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:39:37,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-19 05:39:37,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378549555] [2021-11-19 05:39:37,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:37,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:39:37,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:39:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:39:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:39:37,979 INFO L87 Difference]: Start difference. First operand 318 states and 379 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:39:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:38,167 INFO L93 Difference]: Finished difference Result 353 states and 417 transitions. [2021-11-19 05:39:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:39:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-19 05:39:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:38,170 INFO L225 Difference]: With dead ends: 353 [2021-11-19 05:39:38,170 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 05:39:38,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:39:38,171 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:38,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 179 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:39:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 05:39:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 346. [2021-11-19 05:39:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 279 states have (on average 1.2186379928315412) internal successors, (340), 296 states have internal predecessors, (340), 28 states have call successors, (28), 26 states have call predecessors, (28), 29 states have return successors, (47), 23 states have call predecessors, (47), 27 states have call successors, (47) [2021-11-19 05:39:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 415 transitions. [2021-11-19 05:39:38,180 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 415 transitions. Word has length 52 [2021-11-19 05:39:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:38,180 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 415 transitions. [2021-11-19 05:39:38,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:39:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 415 transitions. [2021-11-19 05:39:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 05:39:38,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:38,182 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:38,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-19 05:39:38,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:39:38,394 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:39:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 754474246, now seen corresponding path program 1 times [2021-11-19 05:39:38,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:39:38,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821517461] [2021-11-19 05:39:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:38,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:39:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:39:38,397 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:39:38,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 05:39:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 05:39:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:38,702 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:39:38,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-19 05:39:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 05:39:39,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 05:39:39,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:39:39,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821517461] [2021-11-19 05:39:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821517461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:39,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:39:39,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:39:39,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662444129] [2021-11-19 05:39:39,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:39,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:39:39,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:39:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:39:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:39:39,689 INFO L87 Difference]: Start difference. First operand 346 states and 415 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 05:39:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:39,924 INFO L93 Difference]: Finished difference Result 360 states and 425 transitions. [2021-11-19 05:39:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:39:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2021-11-19 05:39:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:39,926 INFO L225 Difference]: With dead ends: 360 [2021-11-19 05:39:39,926 INFO L226 Difference]: Without dead ends: 360 [2021-11-19 05:39:39,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:39:39,927 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 55 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:39,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2021-11-19 05:39:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-19 05:39:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 346. [2021-11-19 05:39:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 279 states have (on average 1.2150537634408602) internal successors, (339), 296 states have internal predecessors, (339), 28 states have call successors, (28), 26 states have call predecessors, (28), 29 states have return successors, (47), 23 states have call predecessors, (47), 27 states have call successors, (47) [2021-11-19 05:39:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 414 transitions. [2021-11-19 05:39:39,937 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 414 transitions. Word has length 54 [2021-11-19 05:39:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:39,937 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 414 transitions. [2021-11-19 05:39:39,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 05:39:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 414 transitions. [2021-11-19 05:39:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:39:39,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:39,939 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:39,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 05:39:40,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:39:40,151 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:39:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -321712224, now seen corresponding path program 1 times [2021-11-19 05:39:40,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:39:40,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124682344] [2021-11-19 05:39:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:40,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:39:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:39:40,154 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:39:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 05:39:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 05:39:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:39:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:39:40,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:39:40,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:39:40,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:39:40,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:39:41,038 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:39:41,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:39:41,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:39:41,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-19 05:39:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:39:41,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:40:29,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:40:29,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124682344] [2021-11-19 05:40:29,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124682344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:40:29,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:40:29,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-11-19 05:40:29,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921355400] [2021-11-19 05:40:29,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:40:29,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:40:29,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:40:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:40:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=167, Unknown=31, NotChecked=0, Total=272 [2021-11-19 05:40:29,501 INFO L87 Difference]: Start difference. First operand 346 states and 414 transitions. Second operand has 17 states, 16 states have (on average 4.0625) internal successors, (65), 13 states have internal predecessors, (65), 8 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:40:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:32,328 INFO L93 Difference]: Finished difference Result 421 states and 499 transitions. [2021-11-19 05:40:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:40:32,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0625) internal successors, (65), 13 states have internal predecessors, (65), 8 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 56 [2021-11-19 05:40:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:32,331 INFO L225 Difference]: With dead ends: 421 [2021-11-19 05:40:32,331 INFO L226 Difference]: Without dead ends: 421 [2021-11-19 05:40:32,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=125, Invalid=263, Unknown=32, NotChecked=0, Total=420 [2021-11-19 05:40:32,332 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 186 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:32,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 471 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 549 Unchecked, 0.4s Time] [2021-11-19 05:40:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-19 05:40:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 398. [2021-11-19 05:40:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 321 states have (on average 1.2118380062305296) internal successors, (389), 338 states have internal predecessors, (389), 33 states have call successors, (33), 31 states have call predecessors, (33), 34 states have return successors, (54), 28 states have call predecessors, (54), 32 states have call successors, (54) [2021-11-19 05:40:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 476 transitions. [2021-11-19 05:40:32,343 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 476 transitions. Word has length 56 [2021-11-19 05:40:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:32,343 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 476 transitions. [2021-11-19 05:40:32,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0625) internal successors, (65), 13 states have internal predecessors, (65), 8 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:40:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 476 transitions. [2021-11-19 05:40:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:40:32,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:32,345 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:32,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 05:40:32,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:40:32,557 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:40:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 572587602, now seen corresponding path program 2 times [2021-11-19 05:40:32,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:40:32,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178087524] [2021-11-19 05:40:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:40:32,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:40:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:40:32,559 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:40:32,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 05:40:32,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:40:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:40:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:40:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:40:33,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 05:40:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-19 05:40:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:40:34,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:40:34,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178087524] [2021-11-19 05:40:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178087524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:40:34,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:40:34,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-19 05:40:34,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890655689] [2021-11-19 05:40:34,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:40:34,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:40:34,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:40:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:40:34,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:40:34,370 INFO L87 Difference]: Start difference. First operand 398 states and 476 transitions. Second operand has 13 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:40:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:35,404 INFO L93 Difference]: Finished difference Result 430 states and 496 transitions. [2021-11-19 05:40:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:40:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 56 [2021-11-19 05:40:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:35,407 INFO L225 Difference]: With dead ends: 430 [2021-11-19 05:40:35,407 INFO L226 Difference]: Without dead ends: 430 [2021-11-19 05:40:35,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:40:35,407 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 310 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:35,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 246 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 05:40:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-19 05:40:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2021-11-19 05:40:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 322 states have (on average 1.18944099378882) internal successors, (383), 339 states have internal predecessors, (383), 33 states have call successors, (33), 31 states have call predecessors, (33), 34 states have return successors, (54), 28 states have call predecessors, (54), 32 states have call successors, (54) [2021-11-19 05:40:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 470 transitions. [2021-11-19 05:40:35,417 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 470 transitions. Word has length 56 [2021-11-19 05:40:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:35,417 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 470 transitions. [2021-11-19 05:40:35,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:40:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 470 transitions. [2021-11-19 05:40:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:40:35,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:35,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:35,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 05:40:35,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:40:35,627 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:40:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:35,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1913865262, now seen corresponding path program 1 times [2021-11-19 05:40:35,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:40:35,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207088204] [2021-11-19 05:40:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:35,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:40:35,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:40:35,628 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:40:35,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 05:40:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:40:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:35,866 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:40:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-19 05:40:35,871 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:40:35,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 05:40:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 05:40:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:36,763 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:40:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-11-19 05:40:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 05:40:36,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:40:36,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207088204] [2021-11-19 05:40:36,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207088204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:40:36,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:40:36,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 05:40:36,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741336887] [2021-11-19 05:40:36,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:40:36,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:40:36,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:40:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:40:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:40:36,767 INFO L87 Difference]: Start difference. First operand 399 states and 470 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 05:40:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:37,132 INFO L93 Difference]: Finished difference Result 401 states and 464 transitions. [2021-11-19 05:40:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:40:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-11-19 05:40:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:37,134 INFO L225 Difference]: With dead ends: 401 [2021-11-19 05:40:37,135 INFO L226 Difference]: Without dead ends: 401 [2021-11-19 05:40:37,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:40:37,135 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 52 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:37,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2021-11-19 05:40:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-19 05:40:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 398. [2021-11-19 05:40:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 322 states have (on average 1.170807453416149) internal successors, (377), 338 states have internal predecessors, (377), 33 states have call successors, (33), 31 states have call predecessors, (33), 34 states have return successors, (54), 28 states have call predecessors, (54), 32 states have call successors, (54) [2021-11-19 05:40:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 464 transitions. [2021-11-19 05:40:37,145 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 464 transitions. Word has length 55 [2021-11-19 05:40:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:37,146 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 464 transitions. [2021-11-19 05:40:37,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 05:40:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 464 transitions. [2021-11-19 05:40:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 05:40:37,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:37,147 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:37,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-19 05:40:37,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:40:37,360 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:40:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2056807885, now seen corresponding path program 1 times [2021-11-19 05:40:37,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:40:37,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498411777] [2021-11-19 05:40:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:37,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:40:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:40:37,362 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:40:37,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 05:40:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 05:40:37,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:37,601 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:40:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-19 05:40:37,934 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-19 05:40:37,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2021-11-19 05:40:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:40:38,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:40:38,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:40:38,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498411777] [2021-11-19 05:40:38,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498411777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:40:38,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:40:38,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-11-19 05:40:38,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886857646] [2021-11-19 05:40:38,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:40:38,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:40:38,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:40:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:40:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:40:38,984 INFO L87 Difference]: Start difference. First operand 398 states and 464 transitions. Second operand has 11 states, 10 states have (on average 6.3) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 05:40:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:39,307 INFO L93 Difference]: Finished difference Result 413 states and 471 transitions. [2021-11-19 05:40:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:40:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 59 [2021-11-19 05:40:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:39,310 INFO L225 Difference]: With dead ends: 413 [2021-11-19 05:40:39,310 INFO L226 Difference]: Without dead ends: 413 [2021-11-19 05:40:39,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:40:39,311 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 64 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 248 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 120 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-11-19 05:40:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-19 05:40:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 398. [2021-11-19 05:40:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 322 states have (on average 1.1614906832298137) internal successors, (374), 338 states have internal predecessors, (374), 33 states have call successors, (33), 31 states have call predecessors, (33), 34 states have return successors, (54), 28 states have call predecessors, (54), 32 states have call successors, (54) [2021-11-19 05:40:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 461 transitions. [2021-11-19 05:40:39,321 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 461 transitions. Word has length 59 [2021-11-19 05:40:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:39,321 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 461 transitions. [2021-11-19 05:40:39,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 05:40:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 461 transitions. [2021-11-19 05:40:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 05:40:39,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:39,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:39,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-19 05:40:39,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:40:39,562 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr7REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:40:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1934825285, now seen corresponding path program 1 times [2021-11-19 05:40:39,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:40:39,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137676075] [2021-11-19 05:40:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:39,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:40:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:40:39,564 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:40:39,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 05:40:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 05:40:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:40:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:40:39,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:40:39,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:40:40,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:40:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-19 05:40:40,466 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:40:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-19 05:40:40,472 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:40:40,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-19 05:40:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:40:40,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:41:08,435 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:41:24,744 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:41:27,882 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_c1_~x~0.base_221 (_ BitVec 32))) (or (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0) (bvule .cse0 (select (store |c_#length| v_c1_~x~0.base_221 (_ bv1 32)) |c_~#commands~0.base|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_c1_~x~0.base_221)))))) (exists ((v_c1_~x~0.base_220 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_c1_~x~0.base_220)))) (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_c1_~x~0.base_220 (_ bv1 32)) |c_~#commands~0.base|))))))) (forall ((|v_old(#length)_BEFORE_CALL_23| (Array (_ BitVec 32) (_ BitVec 32))) (|v_old(#valid)_BEFORE_CALL_27| (Array (_ BitVec 32) (_ BitVec 1)))) (exists ((v_c1_~x~0.base_217 (_ BitVec 32))) (and (let ((.cse2 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse2)) (not (bvule .cse2 (select (store |v_old(#length)_BEFORE_CALL_23| v_c1_~x~0.base_217 (_ bv1 32)) |c_~#commands~0.base|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_27| v_c1_~x~0.base_217)))))))))) (forall ((|v_old(#length)_BEFORE_CALL_22| (Array (_ BitVec 32) (_ BitVec 32))) (|v_old(#valid)_BEFORE_CALL_26| (Array (_ BitVec 32) (_ BitVec 1)))) (exists ((v_c1_~x~0.base_211 (_ BitVec 32))) (and (let ((.cse3 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse3)) (not (bvule .cse3 (select (store |v_old(#length)_BEFORE_CALL_22| v_c1_~x~0.base_211 (_ bv1 32)) |c_~#commands~0.base|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_26| v_c1_~x~0.base_211))))))))) is different from true [2021-11-19 05:41:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:41:38,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:41:38,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137676075] [2021-11-19 05:41:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137676075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:41:38,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:41:38,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2021-11-19 05:41:38,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298235282] [2021-11-19 05:41:38,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:41:38,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:41:38,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:41:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:41:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=133, Unknown=22, NotChecked=26, Total=240 [2021-11-19 05:41:38,729 INFO L87 Difference]: Start difference. First operand 398 states and 461 transitions. Second operand has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 12 states have internal predecessors, (70), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:41:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:41:45,367 INFO L93 Difference]: Finished difference Result 410 states and 471 transitions. [2021-11-19 05:41:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:41:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 12 states have internal predecessors, (70), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 62 [2021-11-19 05:41:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:41:45,369 INFO L225 Difference]: With dead ends: 410 [2021-11-19 05:41:45,369 INFO L226 Difference]: Without dead ends: 393 [2021-11-19 05:41:45,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=76, Invalid=175, Unknown=25, NotChecked=30, Total=306 [2021-11-19 05:41:45,370 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 54 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:41:45,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 276 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 256 Unchecked, 0.5s Time] [2021-11-19 05:41:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-19 05:41:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 385. [2021-11-19 05:41:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 309 states have (on average 1.1585760517799353) internal successors, (358), 325 states have internal predecessors, (358), 33 states have call successors, (33), 31 states have call predecessors, (33), 34 states have return successors, (54), 28 states have call predecessors, (54), 32 states have call successors, (54) [2021-11-19 05:41:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 445 transitions. [2021-11-19 05:41:45,377 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 445 transitions. Word has length 62 [2021-11-19 05:41:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:41:45,377 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 445 transitions. [2021-11-19 05:41:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 12 states have internal predecessors, (70), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 05:41:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 445 transitions. [2021-11-19 05:41:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 05:41:45,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:41:45,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:41:45,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 05:41:45,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:41:45,592 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:41:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:41:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1496920893, now seen corresponding path program 1 times [2021-11-19 05:41:45,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:41:45,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024686312] [2021-11-19 05:41:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:41:45,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:41:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:41:45,593 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:41:45,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 05:41:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:41:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 05:41:45,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:41:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:41:45,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 05:41:46,078 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 05:41:46,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-19 05:41:46,154 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:41:46,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-11-19 05:41:46,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:41:46,767 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-19 05:41:46,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:41:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:41:47,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:41:49,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:42:06,720 WARN L860 $PredicateComparison]: unable to prove that (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| |c_~#commands~0.base|))))) (exists ((v_c1_~x~0.base_239 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_c1_~x~0.base_239)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |c_old(#valid)| v_c1_~x~0.base_239 (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) |c_~#commands~0.base|))))) (_ bv1 1)))))) (forall ((|v_old(#valid)_BEFORE_CALL_33| (Array (_ BitVec 32) (_ BitVec 1))) (|v_old(~global~0.base)_BEFORE_CALL_8| (_ BitVec 32))) (exists ((v_c1_~x~0.base_236 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_33| v_c1_~x~0.base_236))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |v_old(#valid)_BEFORE_CALL_33| v_c1_~x~0.base_236 (_ bv1 1)) |v_old(~global~0.base)_BEFORE_CALL_8| (_ bv0 1)) |c_~#commands~0.base|))))))) (_ bv1 1)))))))) is different from true [2021-11-19 05:42:27,241 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:42:29,391 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_c1_~x~0.base_240 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_c1_~x~0.base_240 (_ bv1 1)) c_~global~0.base (_ bv0 1)) |c_~#commands~0.base|))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_c1_~x~0.base_240)))))) (exists ((v_c1_~x~0.base_239 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_c1_~x~0.base_239)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |c_old(#valid)| v_c1_~x~0.base_239 (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) |c_~#commands~0.base|))))) (_ bv1 1)))))) (forall ((|v_old(#valid)_BEFORE_CALL_33| (Array (_ BitVec 32) (_ BitVec 1))) (|v_old(~global~0.base)_BEFORE_CALL_8| (_ BitVec 32))) (exists ((v_c1_~x~0.base_236 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_33| v_c1_~x~0.base_236))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |v_old(#valid)_BEFORE_CALL_33| v_c1_~x~0.base_236 (_ bv1 1)) |v_old(~global~0.base)_BEFORE_CALL_8| (_ bv0 1)) |c_~#commands~0.base|))))))) (_ bv1 1)))))))) is different from true [2021-11-19 05:43:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-19 05:43:53,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:43:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024686312] [2021-11-19 05:43:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024686312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:43:53,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:43:53,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-11-19 05:43:53,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629416158] [2021-11-19 05:43:53,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:43:53,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 05:43:53,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:43:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 05:43:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=560, Unknown=60, NotChecked=106, Total=870 [2021-11-19 05:43:53,234 INFO L87 Difference]: Start difference. First operand 385 states and 445 transitions. Second operand has 30 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 13 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 05:43:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:43:55,591 INFO L93 Difference]: Finished difference Result 447 states and 512 transitions. [2021-11-19 05:43:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:43:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 13 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 64 [2021-11-19 05:43:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:43:55,596 INFO L225 Difference]: With dead ends: 447 [2021-11-19 05:43:55,596 INFO L226 Difference]: Without dead ends: 447 [2021-11-19 05:43:55,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 124.9s TimeCoverageRelationStatistics Valid=168, Invalid=649, Unknown=61, NotChecked=114, Total=992 [2021-11-19 05:43:55,597 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 199 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:43:55,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 582 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 700 Unchecked, 0.1s Time] [2021-11-19 05:43:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-19 05:43:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 411. [2021-11-19 05:43:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 329 states have (on average 1.148936170212766) internal successors, (378), 345 states have internal predecessors, (378), 35 states have call successors, (35), 35 states have call predecessors, (35), 38 states have return successors, (55), 30 states have call predecessors, (55), 34 states have call successors, (55) [2021-11-19 05:43:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 468 transitions. [2021-11-19 05:43:55,608 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 468 transitions. Word has length 64 [2021-11-19 05:43:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:43:55,609 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 468 transitions. [2021-11-19 05:43:55,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 13 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 05:43:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 468 transitions. [2021-11-19 05:43:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 05:43:55,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:43:55,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:43:55,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 05:43:55,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:43:55,824 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:43:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:43:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1496920894, now seen corresponding path program 1 times [2021-11-19 05:43:55,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:43:55,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935786630] [2021-11-19 05:43:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:43:55,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:43:55,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:43:55,826 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:43:55,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 05:43:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:43:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 05:43:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:43:56,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-19 05:43:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-19 05:43:56,714 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:43:56,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-19 05:43:56,840 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:43:56,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-19 05:43:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:43:57,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:43:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-19 05:43:57,634 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-19 05:43:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-11-19 05:44:34,774 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-19 05:44:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-19 05:44:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:44:35,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:44:35,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935786630] [2021-11-19 05:44:35,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935786630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:44:35,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:44:35,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-11-19 05:44:35,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688652446] [2021-11-19 05:44:35,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:44:35,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:44:35,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:44:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:44:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=305, Unknown=19, NotChecked=0, Total=420 [2021-11-19 05:44:35,786 INFO L87 Difference]: Start difference. First operand 411 states and 468 transitions. Second operand has 21 states, 20 states have (on average 4.8) internal successors, (96), 17 states have internal predecessors, (96), 9 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 05:45:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:45:17,152 INFO L93 Difference]: Finished difference Result 465 states and 532 transitions. [2021-11-19 05:45:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 05:45:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 17 states have internal predecessors, (96), 9 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 64 [2021-11-19 05:45:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:45:17,156 INFO L225 Difference]: With dead ends: 465 [2021-11-19 05:45:17,156 INFO L226 Difference]: Without dead ends: 465 [2021-11-19 05:45:17,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=184, Invalid=584, Unknown=44, NotChecked=0, Total=812 [2021-11-19 05:45:17,157 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 139 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:45:17,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 389 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 82 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2021-11-19 05:45:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-19 05:45:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 428. [2021-11-19 05:45:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 341 states have (on average 1.1436950146627567) internal successors, (390), 357 states have internal predecessors, (390), 37 states have call successors, (37), 37 states have call predecessors, (37), 41 states have return successors, (60), 33 states have call predecessors, (60), 36 states have call successors, (60) [2021-11-19 05:45:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 487 transitions. [2021-11-19 05:45:17,171 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 487 transitions. Word has length 64 [2021-11-19 05:45:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:45:17,171 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 487 transitions. [2021-11-19 05:45:17,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 17 states have internal predecessors, (96), 9 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 05:45:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 487 transitions. [2021-11-19 05:45:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 05:45:17,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:45:17,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:45:17,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 05:45:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:45:17,379 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 19 more)] === [2021-11-19 05:45:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:45:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -840092525, now seen corresponding path program 1 times [2021-11-19 05:45:17,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:45:17,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710717140] [2021-11-19 05:45:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:45:17,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:45:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:45:17,381 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:45:17,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce38882-ceea-4979-a9c2-65fa6df1e77a/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 05:45:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:45:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:45:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:45:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 05:45:17,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:45:18,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-11-19 05:45:18,592 INFO L354 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2021-11-19 05:45:18,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 64 [2021-11-19 05:45:18,800 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-19 05:45:18,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 54 [2021-11-19 05:45:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-11-19 05:45:20,199 INFO L354 Elim1Store]: treesize reduction 141, result has 22.5 percent of original size [2021-11-19 05:45:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 125 [2021-11-19 05:45:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-11-19 05:45:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:45:21,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:45:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-11-19 05:45:26,692 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_c1_~x~0.base_295 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_c1_~x~0.base_295))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |c_old(#valid)| v_c1_~x~0.base_295 (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))) (_ bv1 1)))) is different from true [2021-11-19 05:46:00,559 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_c1_~x~0.base_298 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| v_c1_~x~0.base_298))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store (store |c_old(#valid)| v_c1_~x~0.base_298 (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| c_~global~0.base (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))))))) (_ bv1 1))) (forall ((|v_old(#valid)_BEFORE_CALL_43| (Array (_ BitVec 32) (_ BitVec 1))) (|v_old(~global~0.base)_BEFORE_CALL_12| (_ BitVec 32))) (exists ((v_c1_~x~0.base_295 (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |v_old(#valid)_BEFORE_CALL_43| v_c1_~x~0.base_295 (_ bv1 1)) |v_old(~global~0.base)_BEFORE_CALL_12| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_43| v_c1_~x~0.base_295)))))))))))) is different from true [2021-11-19 05:46:02,748 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_c1_~x~0.base_299 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_c1_~x~0.base_299 (_ bv1 1)) c_~global~0.base (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_c1_~x~0.base_299)))))) (exists ((v_c1_~x~0.base_298 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| v_c1_~x~0.base_298))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store (store |c_old(#valid)| v_c1_~x~0.base_298 (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))) (_ bv1 1)))))) (forall ((|v_old(#valid)_BEFORE_CALL_43| (Array (_ BitVec 32) (_ BitVec 1))) (|v_old(~global~0.base)_BEFORE_CALL_12| (_ BitVec 32))) (exists ((v_c1_~x~0.base_295 (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store (store |v_old(#valid)_BEFORE_CALL_43| v_c1_~x~0.base_295 (_ bv1 1)) |v_old(~global~0.base)_BEFORE_CALL_12| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|)))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |v_old(#valid)_BEFORE_CALL_43| v_c1_~x~0.base_295)))))))))))) is different from true [2021-11-19 05:46:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-19 05:46:49,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:46:49,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710717140] [2021-11-19 05:46:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710717140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:46:49,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:46:49,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-11-19 05:46:49,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534815830] [2021-11-19 05:46:49,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:46:49,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 05:46:49,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:46:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 05:46:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1247, Unknown=33, NotChecked=228, Total=1722 [2021-11-19 05:46:49,180 INFO L87 Difference]: Start difference. First operand 428 states and 487 transitions. Second operand has 42 states, 40 states have (on average 2.45) internal successors, (98), 37 states have internal predecessors, (98), 14 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14)