./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:24:43,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:24:43,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:24:43,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:24:43,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:24:43,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:24:43,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:24:43,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:24:43,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:24:43,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:24:43,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:24:43,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:24:43,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:24:43,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:24:43,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:24:43,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:24:43,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:24:43,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:24:43,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:24:43,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:24:43,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:24:43,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:24:43,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:24:43,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:24:43,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:24:43,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:24:43,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:24:43,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:24:43,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:24:43,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:24:43,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:24:43,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:24:43,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:24:43,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:24:43,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:24:43,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:24:43,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:24:43,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:24:43,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:24:43,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:24:43,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:24:43,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:24:43,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:24:43,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:24:43,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:24:43,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:24:43,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:24:43,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:24:43,998 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:24:43,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:24:43,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:24:43,999 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:24:43,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:24:44,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:24:44,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:24:44,002 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:24:44,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:24:44,003 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:24:44,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:24:44,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:24:44,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:24:44,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:24:44,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:24:44,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:24:44,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:24:44,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:24:44,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:24:44,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:24:44,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:24:44,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:24:44,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:24:44,010 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_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-10-28 23:24:44,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:24:44,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:24:44,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:24:44,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:24:44,413 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:24:44,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-28 23:24:44,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/aa192b6aa/6619a6f9a8c148c58dbc4c73b8f0e186/FLAGb28971f10 [2021-10-28 23:24:45,195 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:24:45,196 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-28 23:24:45,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/aa192b6aa/6619a6f9a8c148c58dbc4c73b8f0e186/FLAGb28971f10 [2021-10-28 23:24:45,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/aa192b6aa/6619a6f9a8c148c58dbc4c73b8f0e186 [2021-10-28 23:24:45,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:24:45,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:24:45,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:24:45,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:24:45,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:24:45,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:24:45" (1/1) ... [2021-10-28 23:24:45,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1dc828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:45, skipping insertion in model container [2021-10-28 23:24:45,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:24:45" (1/1) ... [2021-10-28 23:24:45,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:24:45,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:24:46,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:24:46,139 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:24:46,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:24:46,253 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:24:46,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46 WrapperNode [2021-10-28 23:24:46,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:24:46,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:24:46,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:24:46,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:24:46,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:24:46,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:24:46,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:24:46,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:24:46,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (1/1) ... [2021-10-28 23:24:46,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:24:46,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:46,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:24:46,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:24:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:24:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:24:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-28 23:24:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:24:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:24:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-28 23:24:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-28 23:24:46,505 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-28 23:24:46,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:24:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:24:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:24:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:24:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:24:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:24:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:24:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:24:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:24:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:24:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:24:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:24:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:24:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:24:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:24:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:24:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:24:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:24:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:24:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:24:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:24:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:24:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:24:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:24:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:24:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:24:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:24:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:24:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:24:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:24:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:24:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:24:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:24:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:24:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:24:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:24:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:24:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:24:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:24:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:24:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:24:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:24:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:24:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:24:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:24:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:24:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:24:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:24:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:24:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:24:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-28 23:24:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-28 23:24:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-28 23:24:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-28 23:24:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-28 23:24:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-28 23:24:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-28 23:24:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-28 23:24:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-28 23:24:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-28 23:24:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-28 23:24:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-28 23:24:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-28 23:24:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-28 23:24:46,540 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-28 23:24:46,541 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-28 23:24:46,541 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-28 23:24:46,541 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-28 23:24:46,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-28 23:24:46,546 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-28 23:24:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-28 23:24:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-28 23:24:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:24:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:24:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:24:46,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:24:47,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:24:47,384 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 23:24:47,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:24:47 BoogieIcfgContainer [2021-10-28 23:24:47,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:24:47,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:24:47,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:24:47,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:24:47,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:24:45" (1/3) ... [2021-10-28 23:24:47,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490445d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:24:47, skipping insertion in model container [2021-10-28 23:24:47,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:24:46" (2/3) ... [2021-10-28 23:24:47,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490445d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:24:47, skipping insertion in model container [2021-10-28 23:24:47,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:24:47" (3/3) ... [2021-10-28 23:24:47,402 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-10-28 23:24:47,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:24:47,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 23:24:47,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:24:47,506 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:24:47,506 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 23:24:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.736842105263158) internal successors, (66), 59 states have internal predecessors, (66), 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) [2021-10-28 23:24:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:24:47,541 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:47,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:47,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1583989328, now seen corresponding path program 1 times [2021-10-28 23:24:47,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:47,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074775476] [2021-10-28 23:24:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:47,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:48,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:48,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074775476] [2021-10-28 23:24:48,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074775476] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:48,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:48,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:24:48,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745851318] [2021-10-28 23:24:48,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:24:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:24:48,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:24:48,251 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.736842105263158) internal successors, (66), 59 states have internal predecessors, (66), 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) [2021-10-28 23:24:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:48,730 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2021-10-28 23:24:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:24:48,732 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 [2021-10-28 23:24:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:48,744 INFO L225 Difference]: With dead ends: 97 [2021-10-28 23:24:48,744 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 23:24:48,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:24:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 23:24:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-10-28 23:24:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 64 states have internal predecessors, (71), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2021-10-28 23:24:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-10-28 23:24:48,835 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 9 [2021-10-28 23:24:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:48,835 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-10-28 23:24:48,836 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) [2021-10-28 23:24:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-10-28 23:24:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:24:48,838 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:48,838 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:24:48,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1583989329, now seen corresponding path program 1 times [2021-10-28 23:24:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:48,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074308021] [2021-10-28 23:24:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:48,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:49,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:49,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:49,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074308021] [2021-10-28 23:24:49,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074308021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:49,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:49,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:24:49,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839944054] [2021-10-28 23:24:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:24:49,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:24:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:24:49,168 INFO L87 Difference]: Start difference. First operand 84 states and 110 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) [2021-10-28 23:24:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:50,019 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2021-10-28 23:24:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:24:50,021 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 [2021-10-28 23:24:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:50,024 INFO L225 Difference]: With dead ends: 165 [2021-10-28 23:24:50,025 INFO L226 Difference]: Without dead ends: 165 [2021-10-28 23:24:50,026 INFO L786 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 [2021-10-28 23:24:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-28 23:24:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-10-28 23:24:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 106 states have internal predecessors, (141), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (35), 16 states have call predecessors, (35), 15 states have call successors, (35) [2021-10-28 23:24:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 192 transitions. [2021-10-28 23:24:50,052 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 192 transitions. Word has length 9 [2021-10-28 23:24:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:50,054 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 192 transitions. [2021-10-28 23:24:50,055 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) [2021-10-28 23:24:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 192 transitions. [2021-10-28 23:24:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:24:50,055 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:50,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:50,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:24:50,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1859028932, now seen corresponding path program 1 times [2021-10-28 23:24:50,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:50,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520337899] [2021-10-28 23:24:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:50,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:50,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:50,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520337899] [2021-10-28 23:24:50,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520337899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:50,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:50,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:24:50,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310913490] [2021-10-28 23:24:50,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:24:50,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:24:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:24:50,494 INFO L87 Difference]: Start difference. First operand 134 states and 192 transitions. Second operand has 6 states, 4 states have (on average 1.5) 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) [2021-10-28 23:24:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:51,526 INFO L93 Difference]: Finished difference Result 246 states and 348 transitions. [2021-10-28 23:24:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:24:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) 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 [2021-10-28 23:24:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:51,531 INFO L225 Difference]: With dead ends: 246 [2021-10-28 23:24:51,531 INFO L226 Difference]: Without dead ends: 246 [2021-10-28 23:24:51,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:24:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-28 23:24:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2021-10-28 23:24:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.6176470588235294) internal successors, (220), 156 states have internal predecessors, (220), 20 states have call successors, (20), 16 states have call predecessors, (20), 18 states have return successors, (43), 19 states have call predecessors, (43), 19 states have call successors, (43) [2021-10-28 23:24:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 283 transitions. [2021-10-28 23:24:51,564 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 283 transitions. Word has length 10 [2021-10-28 23:24:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:51,565 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 283 transitions. [2021-10-28 23:24:51,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) 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) [2021-10-28 23:24:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 283 transitions. [2021-10-28 23:24:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:24:51,566 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:51,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:51,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:24:51,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1795322128, now seen corresponding path program 1 times [2021-10-28 23:24:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:51,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336318989] [2021-10-28 23:24:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:51,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:51,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:52,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:52,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336318989] [2021-10-28 23:24:52,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336318989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:52,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:24:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288745811] [2021-10-28 23:24:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:24:52,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:24:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:24:52,069 INFO L87 Difference]: Start difference. First operand 192 states and 283 transitions. Second operand has 7 states, 5 states have (on average 1.4) 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) [2021-10-28 23:24:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:53,187 INFO L93 Difference]: Finished difference Result 226 states and 305 transitions. [2021-10-28 23:24:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:24:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) 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 [2021-10-28 23:24:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:53,191 INFO L225 Difference]: With dead ends: 226 [2021-10-28 23:24:53,192 INFO L226 Difference]: Without dead ends: 226 [2021-10-28 23:24:53,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:24:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-28 23:24:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2021-10-28 23:24:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.6029411764705883) internal successors, (218), 156 states have internal predecessors, (218), 20 states have call successors, (20), 16 states have call predecessors, (20), 18 states have return successors, (43), 19 states have call predecessors, (43), 19 states have call successors, (43) [2021-10-28 23:24:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 281 transitions. [2021-10-28 23:24:53,228 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 281 transitions. Word has length 11 [2021-10-28 23:24:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:53,229 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 281 transitions. [2021-10-28 23:24:53,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) 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) [2021-10-28 23:24:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 281 transitions. [2021-10-28 23:24:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:24:53,230 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:53,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:24:53,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -179588794, now seen corresponding path program 1 times [2021-10-28 23:24:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:53,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861446927] [2021-10-28 23:24:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:53,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:53,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:53,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861446927] [2021-10-28 23:24:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861446927] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:53,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:53,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:24:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301928228] [2021-10-28 23:24:53,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:24:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:24:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:24:53,462 INFO L87 Difference]: Start difference. First operand 192 states and 281 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) [2021-10-28 23:24:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:54,476 INFO L93 Difference]: Finished difference Result 271 states and 367 transitions. [2021-10-28 23:24:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:24:54,477 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 [2021-10-28 23:24:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:54,480 INFO L225 Difference]: With dead ends: 271 [2021-10-28 23:24:54,480 INFO L226 Difference]: Without dead ends: 271 [2021-10-28 23:24:54,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:24:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-28 23:24:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 223. [2021-10-28 23:24:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.5818181818181818) internal successors, (261), 186 states have internal predecessors, (261), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-28 23:24:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 325 transitions. [2021-10-28 23:24:54,503 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 325 transitions. Word has length 12 [2021-10-28 23:24:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:54,504 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 325 transitions. [2021-10-28 23:24:54,504 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) [2021-10-28 23:24:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 325 transitions. [2021-10-28 23:24:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:24:54,505 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:54,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:54,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:24:54,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1272285230, now seen corresponding path program 1 times [2021-10-28 23:24:54,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:54,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646191211] [2021-10-28 23:24:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:54,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:54,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:54,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:54,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646191211] [2021-10-28 23:24:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646191211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:24:54,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:24:54,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:24:54,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401149094] [2021-10-28 23:24:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:24:54,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:24:54,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:24:54,778 INFO L87 Difference]: Start difference. First operand 223 states and 325 transitions. Second operand has 7 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) [2021-10-28 23:24:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:55,782 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2021-10-28 23:24:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:24:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 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 [2021-10-28 23:24:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:55,785 INFO L225 Difference]: With dead ends: 255 [2021-10-28 23:24:55,786 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 23:24:55,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:24:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 23:24:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-10-28 23:24:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.5696969696969696) internal successors, (259), 186 states have internal predecessors, (259), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-28 23:24:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 323 transitions. [2021-10-28 23:24:55,803 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 323 transitions. Word has length 13 [2021-10-28 23:24:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:55,803 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 323 transitions. [2021-10-28 23:24:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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) [2021-10-28 23:24:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 323 transitions. [2021-10-28 23:24:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 23:24:55,805 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:55,805 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:55,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:24:55,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 668439832, now seen corresponding path program 1 times [2021-10-28 23:24:55,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:55,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022844399] [2021-10-28 23:24:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:55,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:56,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:56,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022844399] [2021-10-28 23:24:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022844399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:56,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871287192] [2021-10-28 23:24:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:56,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:56,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:56,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:24:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:24:56,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:56,512 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-28 23:24:56,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 51 [2021-10-28 23:24:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:56,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871287192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:56,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:24:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-28 23:24:56,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080265117] [2021-10-28 23:24:56,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:24:56,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:24:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:24:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:24:56,875 INFO L87 Difference]: Start difference. First operand 223 states and 323 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:24:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:24:57,882 INFO L93 Difference]: Finished difference Result 257 states and 343 transitions. [2021-10-28 23:24:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:24:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 23:24:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:24:57,885 INFO L225 Difference]: With dead ends: 257 [2021-10-28 23:24:57,886 INFO L226 Difference]: Without dead ends: 257 [2021-10-28 23:24:57,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:24:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-28 23:24:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 227. [2021-10-28 23:24:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 190 states have internal predecessors, (255), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-28 23:24:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 319 transitions. [2021-10-28 23:24:57,903 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 319 transitions. Word has length 17 [2021-10-28 23:24:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:24:57,903 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 319 transitions. [2021-10-28 23:24:57,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:24:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 319 transitions. [2021-10-28 23:24:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:24:57,905 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:24:57,905 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:24:57,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:24:58,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:24:58,122 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:24:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:24:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -753201699, now seen corresponding path program 1 times [2021-10-28 23:24:58,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:24:58,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838795961] [2021-10-28 23:24:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:58,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:24:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:24:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:24:58,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:24:58,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838795961] [2021-10-28 23:24:58,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838795961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:24:58,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200938320] [2021-10-28 23:24:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:24:58,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:24:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:24:58,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:24:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:24:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:24:58,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:24:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:24:59,083 INFO L354 Elim1Store]: treesize reduction 497, result has 11.1 percent of original size [2021-10-28 23:24:59,084 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 7 case distinctions, treesize of input 82 treesize of output 116 [2021-10-28 23:25:11,975 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 94 treesize of output 70 [2021-10-28 23:25:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:12,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200938320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:12,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:25:12,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-28 23:25:12,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885900515] [2021-10-28 23:25:12,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:25:12,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:25:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:25:12,809 INFO L87 Difference]: Start difference. First operand 227 states and 319 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:25:35,939 WARN L207 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-10-28 23:25:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:44,657 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2021-10-28 23:25:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:25:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (6), 6 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 18 [2021-10-28 23:25:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:44,663 INFO L225 Difference]: With dead ends: 283 [2021-10-28 23:25:44,664 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 23:25:44,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=209, Invalid=660, Unknown=1, NotChecked=0, Total=870 [2021-10-28 23:25:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 23:25:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-10-28 23:25:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.497142857142857) internal successors, (262), 196 states have internal predecessors, (262), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-28 23:25:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 326 transitions. [2021-10-28 23:25:44,682 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 326 transitions. Word has length 18 [2021-10-28 23:25:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:44,683 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 326 transitions. [2021-10-28 23:25:44,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:25:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 326 transitions. [2021-10-28 23:25:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:25:44,684 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:44,684 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:44,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:44,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:44,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1874416105, now seen corresponding path program 1 times [2021-10-28 23:25:44,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:44,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907079604] [2021-10-28 23:25:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:44,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:45,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:45,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:45,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907079604] [2021-10-28 23:25:45,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907079604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:45,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671796298] [2021-10-28 23:25:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:45,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:45,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:45,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:25:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:25:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:46,044 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-10-28 23:25:46,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 86 [2021-10-28 23:25:46,056 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 114 treesize of output 112 [2021-10-28 23:25:50,003 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 99 treesize of output 75 [2021-10-28 23:25:50,008 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 72 treesize of output 60 [2021-10-28 23:25:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:51,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671796298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:51,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:25:51,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-28 23:25:51,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673971811] [2021-10-28 23:25:51,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:25:51,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:25:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:51,384 INFO L87 Difference]: Start difference. First operand 233 states and 326 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 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) [2021-10-28 23:25:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:53,428 INFO L93 Difference]: Finished difference Result 262 states and 347 transitions. [2021-10-28 23:25:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 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 19 [2021-10-28 23:25:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:53,432 INFO L225 Difference]: With dead ends: 262 [2021-10-28 23:25:53,433 INFO L226 Difference]: Without dead ends: 262 [2021-10-28 23:25:53,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:25:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-28 23:25:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 233. [2021-10-28 23:25:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.48) internal successors, (259), 196 states have internal predecessors, (259), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-28 23:25:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2021-10-28 23:25:53,449 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 19 [2021-10-28 23:25:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:53,463 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2021-10-28 23:25:53,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 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) [2021-10-28 23:25:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2021-10-28 23:25:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:25:53,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:53,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:53,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:53,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:53,681 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 550415913, now seen corresponding path program 1 times [2021-10-28 23:25:53,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:53,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822032379] [2021-10-28 23:25:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:53,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:53,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:53,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822032379] [2021-10-28 23:25:53,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822032379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:53,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:53,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:25:53,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791719780] [2021-10-28 23:25:53,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:53,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:53,817 INFO L87 Difference]: Start difference. First operand 233 states and 323 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) [2021-10-28 23:25:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:54,219 INFO L93 Difference]: Finished difference Result 331 states and 471 transitions. [2021-10-28 23:25:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:54,220 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 [2021-10-28 23:25:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:54,223 INFO L225 Difference]: With dead ends: 331 [2021-10-28 23:25:54,223 INFO L226 Difference]: Without dead ends: 331 [2021-10-28 23:25:54,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-28 23:25:54,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 312. [2021-10-28 23:25:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 238 states have (on average 1.5) internal successors, (357), 261 states have internal predecessors, (357), 28 states have call successors, (28), 24 states have call predecessors, (28), 28 states have return successors, (76), 26 states have call predecessors, (76), 27 states have call successors, (76) [2021-10-28 23:25:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 461 transitions. [2021-10-28 23:25:54,241 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 461 transitions. Word has length 23 [2021-10-28 23:25:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:54,242 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 461 transitions. [2021-10-28 23:25:54,242 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) [2021-10-28 23:25:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 461 transitions. [2021-10-28 23:25:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:25:54,243 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:54,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:54,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:25:54,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting c2Err3ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 550416137, now seen corresponding path program 1 times [2021-10-28 23:25:54,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:54,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980392252] [2021-10-28 23:25:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:54,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:54,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:54,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:54,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980392252] [2021-10-28 23:25:54,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980392252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:54,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:54,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:25:54,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772967346] [2021-10-28 23:25:54,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:54,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:54,384 INFO L87 Difference]: Start difference. First operand 312 states and 461 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) [2021-10-28 23:25:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:54,799 INFO L93 Difference]: Finished difference Result 369 states and 522 transitions. [2021-10-28 23:25:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:54,800 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 [2021-10-28 23:25:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:54,805 INFO L225 Difference]: With dead ends: 369 [2021-10-28 23:25:54,805 INFO L226 Difference]: Without dead ends: 369 [2021-10-28 23:25:54,806 INFO L786 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 [2021-10-28 23:25:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-28 23:25:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2021-10-28 23:25:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.4868913857677903) internal successors, (397), 291 states have internal predecessors, (397), 32 states have call successors, (32), 28 states have call predecessors, (32), 34 states have return successors, (85), 31 states have call predecessors, (85), 31 states have call successors, (85) [2021-10-28 23:25:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 514 transitions. [2021-10-28 23:25:54,834 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 514 transitions. Word has length 23 [2021-10-28 23:25:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 514 transitions. [2021-10-28 23:25:54,835 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) [2021-10-28 23:25:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 514 transitions. [2021-10-28 23:25:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:25:54,842 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:54,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:54,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:25:54,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting c2Err1ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -116975829, now seen corresponding path program 1 times [2021-10-28 23:25:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:54,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292370505] [2021-10-28 23:25:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:54,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:54,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:54,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:54,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292370505] [2021-10-28 23:25:54,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292370505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:54,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:54,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:25:54,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530307291] [2021-10-28 23:25:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:54,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:54,986 INFO L87 Difference]: Start difference. First operand 351 states and 514 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) [2021-10-28 23:25:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:55,364 INFO L93 Difference]: Finished difference Result 366 states and 518 transitions. [2021-10-28 23:25:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:25:55,365 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 [2021-10-28 23:25:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:55,368 INFO L225 Difference]: With dead ends: 366 [2021-10-28 23:25:55,368 INFO L226 Difference]: Without dead ends: 366 [2021-10-28 23:25:55,368 INFO L786 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 [2021-10-28 23:25:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-28 23:25:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 351. [2021-10-28 23:25:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.4794007490636705) internal successors, (395), 291 states have internal predecessors, (395), 32 states have call successors, (32), 28 states have call predecessors, (32), 34 states have return successors, (85), 31 states have call predecessors, (85), 31 states have call successors, (85) [2021-10-28 23:25:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 512 transitions. [2021-10-28 23:25:55,389 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 512 transitions. Word has length 24 [2021-10-28 23:25:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:55,392 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 512 transitions. [2021-10-28 23:25:55,392 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) [2021-10-28 23:25:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 512 transitions. [2021-10-28 23:25:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:25:55,398 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:55,398 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:55,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:25:55,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 35178027, now seen corresponding path program 1 times [2021-10-28 23:25:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:55,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718640184] [2021-10-28 23:25:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:55,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:25:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 23:25:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 23:25:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:55,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:55,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718640184] [2021-10-28 23:25:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718640184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:55,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:55,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:25:55,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257281216] [2021-10-28 23:25:55,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:25:55,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:25:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:55,560 INFO L87 Difference]: Start difference. First operand 351 states and 512 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) [2021-10-28 23:25:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:55,794 INFO L93 Difference]: Finished difference Result 260 states and 360 transitions. [2021-10-28 23:25:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:55,795 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 [2021-10-28 23:25:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:55,798 INFO L225 Difference]: With dead ends: 260 [2021-10-28 23:25:55,798 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 23:25:55,798 INFO L786 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 [2021-10-28 23:25:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 23:25:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-10-28 23:25:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 196 states have (on average 1.4540816326530612) internal successors, (285), 216 states have internal predecessors, (285), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (47), 19 states have call predecessors, (47), 23 states have call successors, (47) [2021-10-28 23:25:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 356 transitions. [2021-10-28 23:25:55,823 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 356 transitions. Word has length 33 [2021-10-28 23:25:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 356 transitions. [2021-10-28 23:25:55,823 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) [2021-10-28 23:25:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 356 transitions. [2021-10-28 23:25:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:25:55,825 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:55,825 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:55,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:25:55,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:25:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -138461554, now seen corresponding path program 1 times [2021-10-28 23:25:55,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:55,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67566733] [2021-10-28 23:25:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:55,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:55,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:25:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:56,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:25:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:25:56,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:56,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67566733] [2021-10-28 23:25:56,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67566733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:56,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769709712] [2021-10-28 23:25:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:56,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:56,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:56,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:25:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:25:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:56,748 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-28 23:25:56,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 55 [2021-10-28 23:25:58,732 INFO L354 Elim1Store]: treesize reduction 120, result has 29.0 percent of original size [2021-10-28 23:25:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 55 treesize of output 89 [2021-10-28 23:26:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:26:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769709712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:02,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:26:02,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-10-28 23:26:02,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097374588] [2021-10-28 23:26:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:26:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:26:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:26:02,331 INFO L87 Difference]: Start difference. First operand 257 states and 356 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:26:16,504 WARN L207 SmtUtils]: Spent 12.48 s on a formula simplification that was a NOOP. DAG size: 97 [2021-10-28 23:26:30,919 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-28 23:26:30,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-28 23:26:30,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:31,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:26:31,122 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-10-28 23:26:31,127 INFO L168 Benchmark]: Toolchain (without parser) took 105614.42 ms. Allocated memory was 98.6 MB in the beginning and 293.6 MB in the end (delta: 195.0 MB). Free memory was 67.7 MB in the beginning and 157.3 MB in the end (delta: -89.7 MB). Peak memory consumption was 103.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:31,128 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:26:31,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.71 ms. Allocated memory is still 98.6 MB. Free memory was 67.4 MB in the beginning and 65.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:31,129 INFO L168 Benchmark]: Boogie Preprocessor took 130.45 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 62.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:31,129 INFO L168 Benchmark]: RCFGBuilder took 1001.77 ms. Allocated memory was 98.6 MB in the beginning and 138.4 MB in the end (delta: 39.8 MB). Free memory was 62.1 MB in the beginning and 101.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:31,130 INFO L168 Benchmark]: TraceAbstraction took 103735.18 ms. Allocated memory was 138.4 MB in the beginning and 293.6 MB in the end (delta: 155.2 MB). Free memory was 101.0 MB in the beginning and 157.3 MB in the end (delta: -56.4 MB). Peak memory consumption was 98.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:31,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 98.6 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 737.71 ms. Allocated memory is still 98.6 MB. Free memory was 67.4 MB in the beginning and 65.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 130.45 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 62.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1001.77 ms. Allocated memory was 98.6 MB in the beginning and 138.4 MB in the end (delta: 39.8 MB). Free memory was 62.1 MB in the beginning and 101.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 103735.18 ms. Allocated memory was 138.4 MB in the beginning and 293.6 MB in the end (delta: 155.2 MB). Free memory was 101.0 MB in the beginning and 157.3 MB in the end (delta: -56.4 MB). Peak memory consumption was 98.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:26:33,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:26:33,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:26:34,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-28 23:26:34,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:26:34,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:26:34,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:26:34,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:26:34,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:26:34,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:26:34,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:26:34,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:26:34,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:26:34,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:26:34,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:26:34,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:26:34,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:26:34,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:26:34,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:26:34,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:26:34,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:26:34,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-10-28 23:26:34,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:26:34,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:26:34,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:26:34,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 23:26:34,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:26:34,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:26:34,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:26:34,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:26:34,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:26:34,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:26:34,245 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:26:34,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:26:34,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:26:34,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:26:34,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:26:34,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:26:34,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:26:34,248 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:26:34,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:26:34,249 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:26:34,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:26:34,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:26:34,250 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 23:26:34,250 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 23:26:34,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:26:34,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:26:34,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:26:34,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:26:34,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:26:34,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:26:34,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:26:34,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:26:34,253 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 23:26:34,254 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 23:26:34,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:26:34,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 23:26:34,255 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_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-10-28 23:26:34,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:26:34,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:26:34,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:26:34,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:26:34,802 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:26:34,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-28 23:26:34,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/62d58f2e5/332f47a7e3074e358146126e7d2e2c83/FLAG973ee6b83 [2021-10-28 23:26:35,704 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:26:35,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-28 23:26:35,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/62d58f2e5/332f47a7e3074e358146126e7d2e2c83/FLAG973ee6b83 [2021-10-28 23:26:35,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/data/62d58f2e5/332f47a7e3074e358146126e7d2e2c83 [2021-10-28 23:26:35,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:26:35,893 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:26:35,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:26:35,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:26:35,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:26:35,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:26:35" (1/1) ... [2021-10-28 23:26:35,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0ce6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:35, skipping insertion in model container [2021-10-28 23:26:35,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:26:35" (1/1) ... [2021-10-28 23:26:35,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:26:35,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:26:36,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:26:36,491 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:26:36,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:26:36,623 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:26:36,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36 WrapperNode [2021-10-28 23:26:36,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:26:36,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:26:36,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:26:36,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:26:36,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:26:36,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:26:36,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:26:36,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:26:36,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (1/1) ... [2021-10-28 23:26:36,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:26:36,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:36,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:26:36,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:26:36,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:26:36,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:26:36,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-28 23:26:36,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 23:26:36,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:26:36,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:26:36,859 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-28 23:26:36,860 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-28 23:26:36,861 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-28 23:26:36,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:26:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:26:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:26:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:26:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:26:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:26:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:26:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:26:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:26:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:26:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:26:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:26:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:26:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:26:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:26:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:26:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:26:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:26:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:26:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:26:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:26:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:26:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:26:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:26:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:26:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:26:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:26:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:26:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:26:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:26:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:26:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:26:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:26:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:26:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:26:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:26:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:26:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:26:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:26:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:26:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:26:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:26:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:26:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:26:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:26:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:26:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:26:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:26:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:26:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:26:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:26:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:26:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:26:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:26:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:26:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:26:36,899 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:26:36,899 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:26:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:26:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:26:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:26:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:26:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:26:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:26:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:26:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:26:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:26:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:26:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:26:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:26:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:26:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:26:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:26:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:26:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:26:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:26:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:26:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:26:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:26:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:26:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:26:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:26:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:26:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:26:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:26:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:26:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:26:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:26:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:26:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:26:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:26:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:26:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:26:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:26:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:26:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:26:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:26:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:26:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:26:36,912 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:26:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:26:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:26:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:26:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:26:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:26:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:26:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-28 23:26:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-28 23:26:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-28 23:26:36,915 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-28 23:26:36,915 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-28 23:26:36,915 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-28 23:26:36,915 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-28 23:26:36,916 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-28 23:26:36,916 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-28 23:26:36,916 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-28 23:26:36,917 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-28 23:26:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-28 23:26:36,921 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-28 23:26:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-28 23:26:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-28 23:26:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-28 23:26:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-28 23:26:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-28 23:26:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-28 23:26:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:26:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:26:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 23:26:37,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:26:37,838 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 23:26:37,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:26:37 BoogieIcfgContainer [2021-10-28 23:26:37,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:26:37,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:26:37,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:26:37,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:26:37,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:26:35" (1/3) ... [2021-10-28 23:26:37,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b48879e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:26:37, skipping insertion in model container [2021-10-28 23:26:37,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:36" (2/3) ... [2021-10-28 23:26:37,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b48879e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:26:37, skipping insertion in model container [2021-10-28 23:26:37,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:26:37" (3/3) ... [2021-10-28 23:26:37,852 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-10-28 23:26:37,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:26:37,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-28 23:26:37,921 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:26:37,930 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:26:37,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-28 23:26:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.736842105263158) internal successors, (66), 59 states have internal predecessors, (66), 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) [2021-10-28 23:26:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:26:37,963 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:37,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:37,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:26:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1137100954, now seen corresponding path program 1 times [2021-10-28 23:26:38,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:26:38,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212118245] [2021-10-28 23:26:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:38,004 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:26:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:26:38,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:26:38,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 23:26:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:26:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:38,854 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-28 23:26:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 69 [2021-10-28 23:26:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:39,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:26:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:40,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:26:40,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212118245] [2021-10-28 23:26:40,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212118245] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:40,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:40,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 23:26:40,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025882920] [2021-10-28 23:26:40,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:26:40,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:26:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:26:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:26:40,125 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.736842105263158) internal successors, (66), 59 states have internal predecessors, (66), 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) [2021-10-28 23:26:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:40,365 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-10-28 23:26:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:26:40,367 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 [2021-10-28 23:26:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:40,385 INFO L225 Difference]: With dead ends: 88 [2021-10-28 23:26:40,385 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 23:26:40,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:26:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 23:26:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-10-28 23:26:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 60 states have internal predecessors, (69), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 23:26:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-10-28 23:26:40,474 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 9 [2021-10-28 23:26:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:40,474 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-10-28 23:26:40,475 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) [2021-10-28 23:26:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-10-28 23:26:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 23:26:40,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:40,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:40,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:40,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:26:40,696 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:26:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1137100953, now seen corresponding path program 1 times [2021-10-28 23:26:40,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:26:40,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668434762] [2021-10-28 23:26:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:40,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:26:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:26:40,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:26:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 23:26:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:26:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:41,264 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-28 23:26:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 51 [2021-10-28 23:26:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:26:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:41,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:26:41,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668434762] [2021-10-28 23:26:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668434762] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:41,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 23:26:41,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581412619] [2021-10-28 23:26:41,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:26:41,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:26:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:26:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:41,900 INFO L87 Difference]: Start difference. First operand 78 states and 94 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) [2021-10-28 23:26:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:42,670 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2021-10-28 23:26:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:26:42,671 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 [2021-10-28 23:26:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:42,674 INFO L225 Difference]: With dead ends: 164 [2021-10-28 23:26:42,674 INFO L226 Difference]: Without dead ends: 164 [2021-10-28 23:26:42,675 INFO L786 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 [2021-10-28 23:26:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-28 23:26:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2021-10-28 23:26:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.625) internal successors, (143), 105 states have internal predecessors, (143), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2021-10-28 23:26:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 187 transitions. [2021-10-28 23:26:42,702 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 187 transitions. Word has length 9 [2021-10-28 23:26:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:42,703 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 187 transitions. [2021-10-28 23:26:42,703 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) [2021-10-28 23:26:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 187 transitions. [2021-10-28 23:26:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:26:42,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:42,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:42,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:42,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:26:42,921 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:26:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -890391164, now seen corresponding path program 1 times [2021-10-28 23:26:42,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:26:42,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975191796] [2021-10-28 23:26:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:42,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:26:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:26:42,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:26:42,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 23:26:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:43,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:26:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:43,677 INFO L354 Elim1Store]: treesize reduction 463, result has 13.5 percent of original size [2021-10-28 23:26:43,678 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 9 case distinctions, treesize of input 255 treesize of output 299 [2021-10-28 23:26:50,630 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-10-28 23:26:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 126 [2021-10-28 23:27:03,519 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 137 treesize of output 109 [2021-10-28 23:27:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:06,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:27:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:06,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:27:06,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975191796] [2021-10-28 23:27:06,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975191796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:06,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:06,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-28 23:27:06,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686354951] [2021-10-28 23:27:06,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:27:06,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:27:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:27:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:06,928 INFO L87 Difference]: Start difference. First operand 132 states and 187 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) [2021-10-28 23:27:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:09,971 INFO L93 Difference]: Finished difference Result 245 states and 348 transitions. [2021-10-28 23:27:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:27:09,972 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 [2021-10-28 23:27:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:09,975 INFO L225 Difference]: With dead ends: 245 [2021-10-28 23:27:09,976 INFO L226 Difference]: Without dead ends: 245 [2021-10-28 23:27:09,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:27:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-28 23:27:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-10-28 23:27:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.618705035971223) internal successors, (225), 156 states have internal predecessors, (225), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (39), 19 states have call predecessors, (39), 19 states have call successors, (39) [2021-10-28 23:27:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 284 transitions. [2021-10-28 23:27:10,012 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 284 transitions. Word has length 10 [2021-10-28 23:27:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:10,013 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 284 transitions. [2021-10-28 23:27:10,013 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) [2021-10-28 23:27:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 284 transitions. [2021-10-28 23:27:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:27:10,014 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:10,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:10,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:10,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:27:10,229 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:27:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1832322202, now seen corresponding path program 1 times [2021-10-28 23:27:10,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:27:10,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46040466] [2021-10-28 23:27:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:10,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:27:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:27:10,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:27:10,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 23:27:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:27:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:10,967 INFO L354 Elim1Store]: treesize reduction 336, result has 13.8 percent of original size [2021-10-28 23:27:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 124 [2021-10-28 23:27:10,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 23:27:10,982 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 171 treesize of output 167 [2021-10-28 23:27:14,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 23:27:14,627 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-28 23:27:14,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 76 [2021-10-28 23:27:21,517 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 107 treesize of output 83 [2021-10-28 23:27:21,536 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 80 treesize of output 72 [2021-10-28 23:27:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:25,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:27:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:26,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:27:26,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46040466] [2021-10-28 23:27:26,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46040466] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:26,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:26,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-28 23:27:26,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885736739] [2021-10-28 23:27:26,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:27:26,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:27:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:27:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:26,471 INFO L87 Difference]: Start difference. First operand 192 states and 284 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) [2021-10-28 23:27:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:28,932 INFO L93 Difference]: Finished difference Result 337 states and 445 transitions. [2021-10-28 23:27:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:27:28,935 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 [2021-10-28 23:27:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:28,939 INFO L225 Difference]: With dead ends: 337 [2021-10-28 23:27:28,939 INFO L226 Difference]: Without dead ends: 337 [2021-10-28 23:27:28,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:27:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-28 23:27:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 268. [2021-10-28 23:27:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 196 states have (on average 1.5765306122448979) internal successors, (309), 218 states have internal predecessors, (309), 27 states have call successors, (27), 21 states have call predecessors, (27), 27 states have return successors, (62), 28 states have call predecessors, (62), 26 states have call successors, (62) [2021-10-28 23:27:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 398 transitions. [2021-10-28 23:27:28,981 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 398 transitions. Word has length 11 [2021-10-28 23:27:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:28,982 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 398 transitions. [2021-10-28 23:27:28,982 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) [2021-10-28 23:27:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 398 transitions. [2021-10-28 23:27:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:27:28,983 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:28,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:27:28,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:29,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:27:29,192 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-28 23:27:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash -967413306, now seen corresponding path program 1 times [2021-10-28 23:27:29,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:27:29,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998307967] [2021-10-28 23:27:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:29,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:27:29,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:27:29,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:27:29,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 23:27:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:27:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:29,791 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-28 23:27:29,792 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 7 case distinctions, treesize of input 91 treesize of output 133 [2021-10-28 23:27:33,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:27:33,321 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 96 treesize of output 92 [2021-10-28 23:27:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:43,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:27:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:43,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:27:43,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998307967] [2021-10-28 23:27:43,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998307967] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:43,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:43,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-28 23:27:43,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280384408] [2021-10-28 23:27:43,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:27:43,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:27:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:27:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:43,858 INFO L87 Difference]: Start difference. First operand 268 states and 398 transitions. Second operand has 9 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) [2021-10-28 23:27:57,696 WARN L207 SmtUtils]: Spent 13.37 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-28 23:28:31,439 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-28 23:28:31,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-28 23:28:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:31,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:28:31,642 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-10-28 23:28:31,647 INFO L168 Benchmark]: Toolchain (without parser) took 115753.32 ms. Allocated memory was 62.9 MB in the beginning and 146.8 MB in the end (delta: 83.9 MB). Free memory was 41.1 MB in the beginning and 48.6 MB in the end (delta: -7.5 MB). Peak memory consumption was 76.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:31,647 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:28:31,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.69 ms. Allocated memory is still 62.9 MB. Free memory was 40.9 MB in the beginning and 35.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:31,649 INFO L168 Benchmark]: Boogie Preprocessor took 117.96 ms. Allocated memory is still 62.9 MB. Free memory was 35.7 MB in the beginning and 32.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:31,650 INFO L168 Benchmark]: RCFGBuilder took 1096.67 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 32.2 MB in the beginning and 57.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:31,651 INFO L168 Benchmark]: TraceAbstraction took 113802.06 ms. Allocated memory was 83.9 MB in the beginning and 146.8 MB in the end (delta: 62.9 MB). Free memory was 56.4 MB in the beginning and 48.6 MB in the end (delta: 7.8 MB). Peak memory consumption was 71.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:31,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 730.69 ms. Allocated memory is still 62.9 MB. Free memory was 40.9 MB in the beginning and 35.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 117.96 ms. Allocated memory is still 62.9 MB. Free memory was 35.7 MB in the beginning and 32.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1096.67 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 32.2 MB in the beginning and 57.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 113802.06 ms. Allocated memory was 83.9 MB in the beginning and 146.8 MB in the end (delta: 62.9 MB). Free memory was 56.4 MB in the beginning and 48.6 MB in the end (delta: 7.8 MB). Peak memory consumption was 71.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13a14e12-be3a-40be-a83a-f087511bda0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...