./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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-e943c26 [2021-10-21 19:40:34,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:40:34,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:40:34,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:40:34,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:40:34,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:40:34,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:40:34,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:40:34,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:40:34,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:40:34,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:40:34,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:40:34,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:40:34,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:40:34,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:40:34,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:40:34,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:40:34,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:40:34,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:40:34,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:40:34,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:40:34,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:40:34,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:40:34,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:40:34,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:40:34,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:40:34,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:40:34,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:40:34,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:40:34,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:40:34,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:40:34,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:40:34,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:40:34,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:40:34,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:40:34,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:40:34,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:40:34,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:40:34,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:40:34,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:40:34,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:40:34,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:40:34,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:40:34,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:40:34,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:40:34,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:40:34,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:40:34,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:40:34,681 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:40:34,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:40:34,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:40:34,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:40:34,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:40:34,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:40:34,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:40:34,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:40:34,683 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:40:34,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:40:34,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:40:34,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:40:34,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:40:34,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:40:34,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:40:34,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:40:34,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:40:34,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:40:34,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:40:34,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:40:34,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:40:34,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:40:34,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:40:34,685 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-10-21 19:40:34,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:40:34,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:40:34,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:40:34,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:40:34,991 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:40:34,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-10-21 19:40:35,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/f0e83ec70/7a68c6cea5a64f85adc9877ae480d8fc/FLAGc3f9d4c92 [2021-10-21 19:40:35,667 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:40:35,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-10-21 19:40:35,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/f0e83ec70/7a68c6cea5a64f85adc9877ae480d8fc/FLAGc3f9d4c92 [2021-10-21 19:40:35,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/f0e83ec70/7a68c6cea5a64f85adc9877ae480d8fc [2021-10-21 19:40:35,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:40:35,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:40:35,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:40:35,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:40:35,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:40:35,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:40:35" (1/1) ... [2021-10-21 19:40:35,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653d1996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:35, skipping insertion in model container [2021-10-21 19:40:35,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:40:35" (1/1) ... [2021-10-21 19:40:36,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:40:36,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:40:36,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:40:36,397 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:40:36,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:40:36,529 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:40:36,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36 WrapperNode [2021-10-21 19:40:36,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:40:36,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:40:36,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:40:36,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:40:36,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:40:36,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:40:36,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:40:36,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:40:36,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (1/1) ... [2021-10-21 19:40:36,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:40:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:36,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:40:36,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:40:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-21 19:40:36,736 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-21 19:40:36,736 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-21 19:40:36,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:40:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:40:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:40:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:40:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:40:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:40:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:40:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:40:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:40:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:40:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:40:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:40:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:40:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:40:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:40:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:40:36,749 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:40:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-21 19:40:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-21 19:40:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-21 19:40:36,753 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-21 19:40:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-21 19:40:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-21 19:40:36,756 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-21 19:40:36,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:40:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:40:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:40:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 19:40:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:40:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:40:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:40:37,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:40:37,354 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 19:40:37,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:40:37 BoogieIcfgContainer [2021-10-21 19:40:37,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:40:37,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:40:37,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:40:37,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:40:37,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:40:35" (1/3) ... [2021-10-21 19:40:37,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727db95b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:40:37, skipping insertion in model container [2021-10-21 19:40:37,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:40:36" (2/3) ... [2021-10-21 19:40:37,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727db95b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:40:37, skipping insertion in model container [2021-10-21 19:40:37,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:40:37" (3/3) ... [2021-10-21 19:40:37,364 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-10-21 19:40:37,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:40:37,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:40:37,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:40:37,414 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 [2021-10-21 19:40:37,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:40:37,434 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) [2021-10-21 19:40:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:40:37,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:37,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:37,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1583989328, now seen corresponding path program 1 times [2021-10-21 19:40:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:37,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819979071] [2021-10-21 19:40:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:37,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:37,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:37,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819979071] [2021-10-21 19:40:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819979071] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:37,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:37,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:40:37,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423034435] [2021-10-21 19:40:37,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:40:37,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:40:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:40:37,986 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) [2021-10-21 19:40:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:38,458 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2021-10-21 19:40:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:40:38,460 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 [2021-10-21 19:40:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:38,472 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:40:38,472 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:40:38,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:40:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:40:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-10-21 19:40:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.52) internal successors, (76), 70 states have internal predecessors, (76), 12 states have call successors, (12), 7 states have call predecessors, (12), 12 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) [2021-10-21 19:40:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2021-10-21 19:40:38,552 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 9 [2021-10-21 19:40:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2021-10-21 19:40:38,552 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) [2021-10-21 19:40:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2021-10-21 19:40:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:40:38,555 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:38,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:40:38,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1583989329, now seen corresponding path program 1 times [2021-10-21 19:40:38,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:38,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801498819] [2021-10-21 19:40:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:38,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:38,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:38,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801498819] [2021-10-21 19:40:38,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801498819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:38,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:38,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:40:38,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643924298] [2021-10-21 19:40:38,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:40:38,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:40:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:40:38,795 INFO L87 Difference]: Start difference. First operand 92 states and 118 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) [2021-10-21 19:40:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:39,494 INFO L93 Difference]: Finished difference Result 176 states and 238 transitions. [2021-10-21 19:40:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:40:39,498 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 [2021-10-21 19:40:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:39,508 INFO L225 Difference]: With dead ends: 176 [2021-10-21 19:40:39,508 INFO L226 Difference]: Without dead ends: 176 [2021-10-21 19:40:39,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:40:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-21 19:40:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2021-10-21 19:40:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 112 states have internal predecessors, (143), 17 states have call successors, (17), 11 states have call predecessors, (17), 18 states have return successors, (51), 21 states have call predecessors, (51), 16 states have call successors, (51) [2021-10-21 19:40:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2021-10-21 19:40:39,546 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 9 [2021-10-21 19:40:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:39,546 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2021-10-21 19:40:39,547 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) [2021-10-21 19:40:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2021-10-21 19:40:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:40:39,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:39,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:39,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:40:39,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1859028932, now seen corresponding path program 1 times [2021-10-21 19:40:39,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:39,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207839752] [2021-10-21 19:40:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:39,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:39,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:39,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207839752] [2021-10-21 19:40:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207839752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:39,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:39,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:40:39,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652703488] [2021-10-21 19:40:39,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:40:39,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:40:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:40:39,830 INFO L87 Difference]: Start difference. First operand 145 states and 211 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) [2021-10-21 19:40:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:40,636 INFO L93 Difference]: Finished difference Result 270 states and 384 transitions. [2021-10-21 19:40:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:40:40,637 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 [2021-10-21 19:40:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:40,642 INFO L225 Difference]: With dead ends: 270 [2021-10-21 19:40:40,642 INFO L226 Difference]: Without dead ends: 270 [2021-10-21 19:40:40,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:40:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-21 19:40:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 219. [2021-10-21 19:40:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 151 states have (on average 1.5496688741721854) internal successors, (234), 172 states have internal predecessors, (234), 23 states have call successors, (23), 18 states have call predecessors, (23), 27 states have return successors, (67), 28 states have call predecessors, (67), 22 states have call successors, (67) [2021-10-21 19:40:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 324 transitions. [2021-10-21 19:40:40,680 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 324 transitions. Word has length 10 [2021-10-21 19:40:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:40,680 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 324 transitions. [2021-10-21 19:40:40,680 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) [2021-10-21 19:40:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 324 transitions. [2021-10-21 19:40:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:40:40,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:40,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:40,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:40:40,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1795322128, now seen corresponding path program 1 times [2021-10-21 19:40:40,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:40,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088415159] [2021-10-21 19:40:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:40,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:40,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:41,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:41,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088415159] [2021-10-21 19:40:41,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088415159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:41,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:41,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:40:41,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869849597] [2021-10-21 19:40:41,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:40:41,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:40:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:40:41,056 INFO L87 Difference]: Start difference. First operand 219 states and 324 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) [2021-10-21 19:40:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:41,951 INFO L93 Difference]: Finished difference Result 256 states and 361 transitions. [2021-10-21 19:40:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:40:41,952 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 [2021-10-21 19:40:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:41,954 INFO L225 Difference]: With dead ends: 256 [2021-10-21 19:40:41,955 INFO L226 Difference]: Without dead ends: 256 [2021-10-21 19:40:41,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:40:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-21 19:40:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-10-21 19:40:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 151 states have (on average 1.5364238410596027) internal successors, (232), 172 states have internal predecessors, (232), 23 states have call successors, (23), 18 states have call predecessors, (23), 27 states have return successors, (67), 28 states have call predecessors, (67), 22 states have call successors, (67) [2021-10-21 19:40:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2021-10-21 19:40:41,975 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 11 [2021-10-21 19:40:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:41,976 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2021-10-21 19:40:41,976 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) [2021-10-21 19:40:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2021-10-21 19:40:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:40:41,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:41,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:40:41,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:41,978 INFO L82 PathProgramCache]: Analyzing trace with hash -179588794, now seen corresponding path program 1 times [2021-10-21 19:40:41,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:41,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569564959] [2021-10-21 19:40:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:41,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:42,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:42,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:42,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569564959] [2021-10-21 19:40:42,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569564959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:42,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:42,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:40:42,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499024132] [2021-10-21 19:40:42,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:40:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:40:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:40:42,104 INFO L87 Difference]: Start difference. First operand 219 states and 322 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) [2021-10-21 19:40:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:42,851 INFO L93 Difference]: Finished difference Result 290 states and 395 transitions. [2021-10-21 19:40:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:40:42,853 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 [2021-10-21 19:40:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:42,856 INFO L225 Difference]: With dead ends: 290 [2021-10-21 19:40:42,856 INFO L226 Difference]: Without dead ends: 290 [2021-10-21 19:40:42,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:40:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-21 19:40:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 254. [2021-10-21 19:40:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 183 states have (on average 1.5245901639344261) internal successors, (279), 205 states have internal predecessors, (279), 24 states have call successors, (24), 19 states have call predecessors, (24), 29 states have return successors, (72), 29 states have call predecessors, (72), 23 states have call successors, (72) [2021-10-21 19:40:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 375 transitions. [2021-10-21 19:40:42,875 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 375 transitions. Word has length 12 [2021-10-21 19:40:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:42,875 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 375 transitions. [2021-10-21 19:40:42,875 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) [2021-10-21 19:40:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 375 transitions. [2021-10-21 19:40:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:40:42,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:42,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:40:42,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1272285230, now seen corresponding path program 1 times [2021-10-21 19:40:42,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:42,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719072513] [2021-10-21 19:40:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:42,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:43,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:43,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:43,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719072513] [2021-10-21 19:40:43,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719072513] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:40:43,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:40:43,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:40:43,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725135404] [2021-10-21 19:40:43,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:40:43,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:40:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:40:43,050 INFO L87 Difference]: Start difference. First operand 254 states and 375 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) [2021-10-21 19:40:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:43,806 INFO L93 Difference]: Finished difference Result 280 states and 383 transitions. [2021-10-21 19:40:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:40:43,807 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 [2021-10-21 19:40:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:43,809 INFO L225 Difference]: With dead ends: 280 [2021-10-21 19:40:43,810 INFO L226 Difference]: Without dead ends: 280 [2021-10-21 19:40:43,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:40:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-21 19:40:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 254. [2021-10-21 19:40:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 183 states have (on average 1.5136612021857923) internal successors, (277), 205 states have internal predecessors, (277), 24 states have call successors, (24), 19 states have call predecessors, (24), 29 states have return successors, (72), 29 states have call predecessors, (72), 23 states have call successors, (72) [2021-10-21 19:40:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 373 transitions. [2021-10-21 19:40:43,826 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 373 transitions. Word has length 13 [2021-10-21 19:40:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:43,826 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 373 transitions. [2021-10-21 19:40:43,827 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) [2021-10-21 19:40:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 373 transitions. [2021-10-21 19:40:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:40:43,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:43,828 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:43,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:40:43,828 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:43,829 INFO L82 PathProgramCache]: Analyzing trace with hash 668439832, now seen corresponding path program 1 times [2021-10-21 19:40:43,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:43,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351627840] [2021-10-21 19:40:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:43,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:43,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:43,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351627840] [2021-10-21 19:40:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351627840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:43,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050179318] [2021-10-21 19:40:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:43,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:43,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:44,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:40:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:40:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:44,429 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-21 19:40:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-21 19:40:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:44,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050179318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:44,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:44,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-21 19:40:44,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958210239] [2021-10-21 19:40:44,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:40:44,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:40:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:40:44,682 INFO L87 Difference]: Start difference. First operand 254 states and 373 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) [2021-10-21 19:40:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:45,526 INFO L93 Difference]: Finished difference Result 301 states and 422 transitions. [2021-10-21 19:40:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:40:45,526 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 [2021-10-21 19:40:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:45,528 INFO L225 Difference]: With dead ends: 301 [2021-10-21 19:40:45,528 INFO L226 Difference]: Without dead ends: 301 [2021-10-21 19:40:45,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:40:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-21 19:40:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 257. [2021-10-21 19:40:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 186 states have (on average 1.456989247311828) internal successors, (271), 208 states have internal predecessors, (271), 24 states have call successors, (24), 19 states have call predecessors, (24), 29 states have return successors, (72), 29 states have call predecessors, (72), 23 states have call successors, (72) [2021-10-21 19:40:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 367 transitions. [2021-10-21 19:40:45,544 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 367 transitions. Word has length 17 [2021-10-21 19:40:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 367 transitions. [2021-10-21 19:40:45,545 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) [2021-10-21 19:40:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 367 transitions. [2021-10-21 19:40:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:40:45,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:45,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:45,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:45,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:40:45,769 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:40:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash -753201699, now seen corresponding path program 1 times [2021-10-21 19:40:45,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:45,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428352612] [2021-10-21 19:40:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:45,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:46,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:46,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:46,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428352612] [2021-10-21 19:40:46,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428352612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:46,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103331093] [2021-10-21 19:40:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:46,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:46,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:46,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:40:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:40:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:46,488 INFO L354 Elim1Store]: treesize reduction 497, result has 11.1 percent of original size [2021-10-21 19:40:46,489 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 [2021-10-21 19:40:56,185 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 [2021-10-21 19:40:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:40:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103331093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:56,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:56,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-21 19:40:56,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769675881] [2021-10-21 19:40:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:40:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:40:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:40:56,849 INFO L87 Difference]: Start difference. First operand 257 states and 367 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) [2021-10-21 19:41:42,954 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-10-21 19:41:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:53,985 INFO L93 Difference]: Finished difference Result 321 states and 444 transitions. [2021-10-21 19:41:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:41:53,986 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 [2021-10-21 19:41:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:53,991 INFO L225 Difference]: With dead ends: 321 [2021-10-21 19:41:53,992 INFO L226 Difference]: Without dead ends: 321 [2021-10-21 19:41:53,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 26889.0ms TimeCoverageRelationStatistics Valid=251, Invalid=803, Unknown=2, NotChecked=0, Total=1056 [2021-10-21 19:41:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-21 19:41:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 263. [2021-10-21 19:41:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 192 states have (on average 1.4479166666666667) internal successors, (278), 214 states have internal predecessors, (278), 24 states have call successors, (24), 19 states have call predecessors, (24), 29 states have return successors, (72), 29 states have call predecessors, (72), 23 states have call successors, (72) [2021-10-21 19:41:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 374 transitions. [2021-10-21 19:41:54,024 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 374 transitions. Word has length 18 [2021-10-21 19:41:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:54,024 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 374 transitions. [2021-10-21 19:41:54,025 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) [2021-10-21 19:41:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 374 transitions. [2021-10-21 19:41:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:41:54,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:54,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:41:54,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:41:54,250 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:41:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1874416105, now seen corresponding path program 1 times [2021-10-21 19:41:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:41:54,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406700710] [2021-10-21 19:41:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:54,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:41:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:41:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:54,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:41:54,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406700710] [2021-10-21 19:41:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406700710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:41:54,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672140596] [2021-10-21 19:41:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:54,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:41:54,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:41:54,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:41:54,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:41:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:41:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:55,070 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-10-21 19:41:55,071 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 [2021-10-21 19:41:55,075 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 [2021-10-21 19:41:58,183 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 [2021-10-21 19:41:58,188 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 [2021-10-21 19:41:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:41:59,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672140596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:41:59,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:59,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-21 19:41:59,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724466944] [2021-10-21 19:41:59,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:41:59,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:41:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:41:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:41:59,228 INFO L87 Difference]: Start difference. First operand 263 states and 374 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) [2021-10-21 19:42:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:00,846 INFO L93 Difference]: Finished difference Result 310 states and 433 transitions. [2021-10-21 19:42:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:42:00,847 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 [2021-10-21 19:42:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:00,850 INFO L225 Difference]: With dead ends: 310 [2021-10-21 19:42:00,850 INFO L226 Difference]: Without dead ends: 310 [2021-10-21 19:42:00,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:42:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-21 19:42:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 263. [2021-10-21 19:42:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 192 states have (on average 1.4322916666666667) internal successors, (275), 214 states have internal predecessors, (275), 24 states have call successors, (24), 19 states have call predecessors, (24), 29 states have return successors, (72), 29 states have call predecessors, (72), 23 states have call successors, (72) [2021-10-21 19:42:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 371 transitions. [2021-10-21 19:42:00,867 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 371 transitions. Word has length 19 [2021-10-21 19:42:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:00,868 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 371 transitions. [2021-10-21 19:42:00,868 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) [2021-10-21 19:42:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 371 transitions. [2021-10-21 19:42:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:42:00,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:00,870 INFO L512 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] [2021-10-21 19:42:00,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:01,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:01,098 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 550421903, now seen corresponding path program 1 times [2021-10-21 19:42:01,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:01,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967971974] [2021-10-21 19:42:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:01,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:01,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:01,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967971974] [2021-10-21 19:42:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967971974] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:01,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:01,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:42:01,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114000629] [2021-10-21 19:42:01,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:42:01,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:42:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:42:01,206 INFO L87 Difference]: Start difference. First operand 263 states and 371 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) [2021-10-21 19:42:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:01,548 INFO L93 Difference]: Finished difference Result 259 states and 336 transitions. [2021-10-21 19:42:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:42:01,549 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 [2021-10-21 19:42:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:01,551 INFO L225 Difference]: With dead ends: 259 [2021-10-21 19:42:01,551 INFO L226 Difference]: Without dead ends: 259 [2021-10-21 19:42:01,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-21 19:42:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 243. [2021-10-21 19:42:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 178 states have (on average 1.4382022471910112) internal successors, (256), 200 states have internal predecessors, (256), 22 states have call successors, (22), 18 states have call predecessors, (22), 25 states have return successors, (49), 24 states have call predecessors, (49), 21 states have call successors, (49) [2021-10-21 19:42:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 327 transitions. [2021-10-21 19:42:01,562 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 327 transitions. Word has length 23 [2021-10-21 19:42:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:01,562 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 327 transitions. [2021-10-21 19:42:01,563 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) [2021-10-21 19:42:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 327 transitions. [2021-10-21 19:42:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:42:01,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:01,565 INFO L512 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] [2021-10-21 19:42:01,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:42:01,565 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2138371761, now seen corresponding path program 1 times [2021-10-21 19:42:01,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:01,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726650987] [2021-10-21 19:42:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:01,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:42:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:01,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:01,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726650987] [2021-10-21 19:42:01,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726650987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:01,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:01,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:42:01,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160560253] [2021-10-21 19:42:01,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:42:01,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:42:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:01,708 INFO L87 Difference]: Start difference. First operand 243 states and 327 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) [2021-10-21 19:42:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:01,895 INFO L93 Difference]: Finished difference Result 204 states and 259 transitions. [2021-10-21 19:42:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:42:01,896 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 [2021-10-21 19:42:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:01,898 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:42:01,898 INFO L226 Difference]: Without dead ends: 204 [2021-10-21 19:42:01,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-21 19:42:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2021-10-21 19:42:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 144 states have (on average 1.4097222222222223) internal successors, (203), 165 states have internal predecessors, (203), 18 states have call successors, (18), 15 states have call predecessors, (18), 19 states have return successors, (33), 18 states have call predecessors, (33), 17 states have call successors, (33) [2021-10-21 19:42:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2021-10-21 19:42:01,917 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 33 [2021-10-21 19:42:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:01,917 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2021-10-21 19:42:01,917 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) [2021-10-21 19:42:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2021-10-21 19:42:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:42:01,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:01,919 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:01,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:42:01,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash -138461554, now seen corresponding path program 1 times [2021-10-21 19:42:01,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:01,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717452136] [2021-10-21 19:42:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:01,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:02,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:02,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:42:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:42:02,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:02,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717452136] [2021-10-21 19:42:02,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717452136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:02,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369754091] [2021-10-21 19:42:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:02,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:02,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:02,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:42:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:42:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:02,593 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-21 19:42:02,593 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 [2021-10-21 19:42:04,400 INFO L354 Elim1Store]: treesize reduction 120, result has 29.0 percent of original size [2021-10-21 19:42:04,400 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 [2021-10-21 19:42:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:42:07,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369754091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:07,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:07,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-10-21 19:42:07,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474389423] [2021-10-21 19:42:07,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:42:07,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:42:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:42:07,128 INFO L87 Difference]: Start difference. First operand 199 states and 254 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) [2021-10-21 19:42:24,716 WARN L207 SmtUtils]: Spent 9.58 s on a formula simplification that was a NOOP. DAG size: 97 [2021-10-21 19:42:36,007 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-21 19:42:36,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-21 19:42:36,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:36,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:42:36,209 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) 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.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 [2021-10-21 19:42:36,213 INFO L168 Benchmark]: Toolchain (without parser) took 120225.40 ms. Allocated memory was 113.2 MB in the beginning and 224.4 MB in the end (delta: 111.1 MB). Free memory was 81.4 MB in the beginning and 88.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 105.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:36,213 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:42:36,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 542.31 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 81.0 MB in the beginning and 112.3 MB in the end (delta: -31.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:36,214 INFO L168 Benchmark]: Boogie Preprocessor took 113.74 ms. Allocated memory is still 146.8 MB. Free memory was 112.3 MB in the beginning and 109.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:36,214 INFO L168 Benchmark]: RCFGBuilder took 710.24 ms. Allocated memory is still 146.8 MB. Free memory was 109.0 MB in the beginning and 83.0 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:36,214 INFO L168 Benchmark]: TraceAbstraction took 118853.78 ms. Allocated memory was 146.8 MB in the beginning and 224.4 MB in the end (delta: 77.6 MB). Free memory was 82.3 MB in the beginning and 88.9 MB in the end (delta: -6.6 MB). Peak memory consumption was 74.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:36,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 542.31 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 81.0 MB in the beginning and 112.3 MB in the end (delta: -31.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.74 ms. Allocated memory is still 146.8 MB. Free memory was 112.3 MB in the beginning and 109.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 710.24 ms. Allocated memory is still 146.8 MB. Free memory was 109.0 MB in the beginning and 83.0 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 118853.78 ms. Allocated memory was 146.8 MB in the beginning and 224.4 MB in the end (delta: 77.6 MB). Free memory was 82.3 MB in the beginning and 88.9 MB in the end (delta: -6.6 MB). Peak memory consumption was 74.1 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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-e943c26 [2021-10-21 19:42:38,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:42:38,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:42:38,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:42:38,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:42:38,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:42:38,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:42:38,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:42:38,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:42:38,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:42:38,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:42:38,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:42:38,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:42:38,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:42:38,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:42:38,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:42:38,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:42:38,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:42:38,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:42:38,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:42:38,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:42:38,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:42:38,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:42:38,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:42:38,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:42:38,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:42:38,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:42:38,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:42:38,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:42:38,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:42:38,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:42:38,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:42:38,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:42:38,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:42:38,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:42:38,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:42:38,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:42:38,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:42:38,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:42:38,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:42:38,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:42:38,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:42:38,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:42:38,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:42:38,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:42:38,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:42:38,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:42:38,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:42:38,667 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:42:38,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:42:38,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:42:38,668 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:42:38,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:42:38,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:42:38,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:42:38,670 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:42:38,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:42:38,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:42:38,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:42:38,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:42:38,672 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:42:38,672 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:42:38,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:42:38,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:42:38,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:42:38,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:42:38,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:42:38,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:38,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:42:38,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:42:38,674 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:42:38,675 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:42:38,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:42:38,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:42:38,676 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-10-21 19:42:39,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:42:39,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:42:39,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:42:39,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:42:39,146 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:42:39,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-10-21 19:42:39,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/de935473d/8c9d9ad6612f4a27a1da716f80a3fe0c/FLAGeef5bbd52 [2021-10-21 19:42:39,843 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:42:39,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-10-21 19:42:39,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/de935473d/8c9d9ad6612f4a27a1da716f80a3fe0c/FLAGeef5bbd52 [2021-10-21 19:42:40,129 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/data/de935473d/8c9d9ad6612f4a27a1da716f80a3fe0c [2021-10-21 19:42:40,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:42:40,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:42:40,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:40,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:42:40,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:42:40,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a37b850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40, skipping insertion in model container [2021-10-21 19:42:40,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:42:40,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:42:40,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:40,713 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:42:40,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:40,852 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:42:40,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40 WrapperNode [2021-10-21 19:42:40,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:40,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:42:40,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:42:40,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:42:40,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:42:40,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:42:40,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:42:40,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:42:40,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (1/1) ... [2021-10-21 19:42:40,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:41,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:42:41,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:42:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:42:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:42:41,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-21 19:42:41,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:42:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:42:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:42:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-21 19:42:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-21 19:42:41,070 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-21 19:42:41,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:42:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:42:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:42:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:42:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:42:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:42:41,071 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:42:41,072 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:42:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:42:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:42:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:42:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:42:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:42:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:42:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:42:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:42:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:42:41,093 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:42:41,093 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:42:41,093 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:42:41,094 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:42:41,094 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:42:41,094 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:42:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:42:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:42:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:42:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:42:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:42:41,096 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:42:41,096 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:42:41,096 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:42:41,096 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:42:41,097 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:42:41,097 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:42:41,097 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:42:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:42:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:42:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:42:41,099 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:42:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:42:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:42:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:42:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:42:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:42:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:42:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:42:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:42:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:42:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:42:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:42:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:42:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:42:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:42:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:42:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:42:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:42:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:42:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:42:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:42:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:42:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:42:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:42:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:42:41,109 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:42:41,109 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:42:41,109 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:42:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:42:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:42:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-21 19:42:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-21 19:42:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-21 19:42:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-21 19:42:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-21 19:42:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-21 19:42:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-21 19:42:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-21 19:42:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-21 19:42:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-21 19:42:41,114 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-21 19:42:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-21 19:42:41,117 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-21 19:42:41,117 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-21 19:42:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-21 19:42:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-21 19:42:41,119 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-21 19:42:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-21 19:42:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-21 19:42:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-21 19:42:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-21 19:42:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-21 19:42:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-21 19:42:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-21 19:42:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-21 19:42:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-21 19:42:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-21 19:42:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-21 19:42:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:42:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:42:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:42:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:42:41,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:42:41,873 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 19:42:41,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:41 BoogieIcfgContainer [2021-10-21 19:42:41,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:42:41,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:42:41,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:42:41,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:42:41,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:42:40" (1/3) ... [2021-10-21 19:42:41,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a6f543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:41, skipping insertion in model container [2021-10-21 19:42:41,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:40" (2/3) ... [2021-10-21 19:42:41,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a6f543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:41, skipping insertion in model container [2021-10-21 19:42:41,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:41" (3/3) ... [2021-10-21 19:42:41,885 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-10-21 19:42:41,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:42:41,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:42:41,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:42:41,960 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 [2021-10-21 19:42:41,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:42:41,978 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) [2021-10-21 19:42:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:42:42,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:42,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:42,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1137100954, now seen corresponding path program 1 times [2021-10-21 19:42:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:42:42,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127591825] [2021-10-21 19:42:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:42,029 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:42:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:42:42,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:42:42,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:42:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:42:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:42,611 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-21 19:42:42,613 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 [2021-10-21 19:42:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:43,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:42:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:43,566 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:42:43,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127591825] [2021-10-21 19:42:43,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127591825] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:43,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:43,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:42:43,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86138828] [2021-10-21 19:42:43,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:42:43,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:42:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:42:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:42:43,594 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) [2021-10-21 19:42:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:43,760 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-10-21 19:42:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:42:43,762 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 [2021-10-21 19:42:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:43,769 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:42:43,769 INFO L226 Difference]: Without dead ends: 87 [2021-10-21 19:42:43,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:42:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-21 19:42:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-10-21 19:42:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.565217391304348) internal successors, (72), 65 states have internal predecessors, (72), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2021-10-21 19:42:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-10-21 19:42:43,816 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 9 [2021-10-21 19:42:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-10-21 19:42:43,816 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) [2021-10-21 19:42:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-10-21 19:42:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:42:43,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:43,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:43,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:44,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:42:44,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1137100953, now seen corresponding path program 1 times [2021-10-21 19:42:44,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:42:44,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397459592] [2021-10-21 19:42:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:44,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:42:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:42:44,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:42:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:42:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:42:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:44,565 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-21 19:42:44,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-21 19:42:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:44,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:42:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:45,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:42:45,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397459592] [2021-10-21 19:42:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397459592] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:45,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:45,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-21 19:42:45,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197787460] [2021-10-21 19:42:45,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:42:45,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:42:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:42:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:42:45,024 INFO L87 Difference]: Start difference. First operand 83 states and 99 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) [2021-10-21 19:42:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:45,646 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2021-10-21 19:42:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:42:45,647 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 [2021-10-21 19:42:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:45,650 INFO L225 Difference]: With dead ends: 172 [2021-10-21 19:42:45,651 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:42:45,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:42:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:42:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-10-21 19:42:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 91 states have (on average 1.5714285714285714) internal successors, (143), 110 states have internal predecessors, (143), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (41), 18 states have call predecessors, (41), 15 states have call successors, (41) [2021-10-21 19:42:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 200 transitions. [2021-10-21 19:42:45,680 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 200 transitions. Word has length 9 [2021-10-21 19:42:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 200 transitions. [2021-10-21 19:42:45,681 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) [2021-10-21 19:42:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 200 transitions. [2021-10-21 19:42:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:42:45,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:45,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:45,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:42:45,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:42:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash -890391164, now seen corresponding path program 1 times [2021-10-21 19:42:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:42:45,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315878899] [2021-10-21 19:42:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:45,896 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:42:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:42:45,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:42:45,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:42:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:42:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:46,480 INFO L354 Elim1Store]: treesize reduction 463, result has 13.5 percent of original size [2021-10-21 19:42:46,480 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 [2021-10-21 19:42:51,920 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-10-21 19:42:51,921 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 [2021-10-21 19:43:01,763 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 [2021-10-21 19:43:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:03,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:43:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:04,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:43:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315878899] [2021-10-21 19:43:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315878899] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:04,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-21 19:43:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681090692] [2021-10-21 19:43:04,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:04,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:43:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:04,155 INFO L87 Difference]: Start difference. First operand 140 states and 200 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) [2021-10-21 19:43:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:06,733 INFO L93 Difference]: Finished difference Result 260 states and 372 transitions. [2021-10-21 19:43:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:43:06,734 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 [2021-10-21 19:43:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:06,737 INFO L225 Difference]: With dead ends: 260 [2021-10-21 19:43:06,738 INFO L226 Difference]: Without dead ends: 260 [2021-10-21 19:43:06,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1310.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:43:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-21 19:43:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2021-10-21 19:43:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 170 states have internal predecessors, (235), 23 states have call successors, (23), 18 states have call predecessors, (23), 22 states have return successors, (59), 24 states have call predecessors, (59), 22 states have call successors, (59) [2021-10-21 19:43:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 317 transitions. [2021-10-21 19:43:06,769 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 317 transitions. Word has length 10 [2021-10-21 19:43:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:06,770 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 317 transitions. [2021-10-21 19:43:06,770 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) [2021-10-21 19:43:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 317 transitions. [2021-10-21 19:43:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:43:06,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:06,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:06,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:06,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:43:06,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:43:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1832322202, now seen corresponding path program 1 times [2021-10-21 19:43:06,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:43:06,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638513719] [2021-10-21 19:43:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:06,991 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:43:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:43:06,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:43:07,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:43:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:43:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:07,650 INFO L354 Elim1Store]: treesize reduction 336, result has 13.8 percent of original size [2021-10-21 19:43:07,650 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 [2021-10-21 19:43:07,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:43:07,662 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 [2021-10-21 19:43:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:43:10,667 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-21 19:43:10,667 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 [2021-10-21 19:43:16,089 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 [2021-10-21 19:43:16,094 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 [2021-10-21 19:43:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:43:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:20,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:43:20,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638513719] [2021-10-21 19:43:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638513719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:20,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:20,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-21 19:43:20,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155255498] [2021-10-21 19:43:20,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:20,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:43:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:20,017 INFO L87 Difference]: Start difference. First operand 213 states and 317 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) [2021-10-21 19:43:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:21,862 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2021-10-21 19:43:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:43:21,864 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 [2021-10-21 19:43:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:21,869 INFO L225 Difference]: With dead ends: 394 [2021-10-21 19:43:21,869 INFO L226 Difference]: Without dead ends: 394 [2021-10-21 19:43:21,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:43:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-21 19:43:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 319. [2021-10-21 19:43:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 230 states have (on average 1.5521739130434782) internal successors, (357), 255 states have internal predecessors, (357), 34 states have call successors, (34), 27 states have call predecessors, (34), 37 states have return successors, (114), 36 states have call predecessors, (114), 33 states have call successors, (114) [2021-10-21 19:43:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 505 transitions. [2021-10-21 19:43:21,913 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 505 transitions. Word has length 11 [2021-10-21 19:43:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:21,913 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 505 transitions. [2021-10-21 19:43:21,913 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) [2021-10-21 19:43:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 505 transitions. [2021-10-21 19:43:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:43:21,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:21,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:21,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:22,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:43:22,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c1Err0ASSERT_VIOLATIONMEMORY_FREE, c1Err1ASSERT_VIOLATIONMEMORY_FREE, c1Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err0ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:43:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash -967413306, now seen corresponding path program 1 times [2021-10-21 19:43:22,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:43:22,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526960397] [2021-10-21 19:43:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:22,135 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:43:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:43:22,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:43:22,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:43:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:43:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:22,651 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-21 19:43:22,652 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 [2021-10-21 19:43:25,309 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:25,309 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 [2021-10-21 19:43:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:33,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:43:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:33,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:43:33,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526960397] [2021-10-21 19:43:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526960397] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:33,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:33,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-21 19:43:33,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476708931] [2021-10-21 19:43:33,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:43:33,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:43:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:43:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:43:33,432 INFO L87 Difference]: Start difference. First operand 319 states and 505 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) [2021-10-21 19:43:43,719 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-21 19:44:13,382 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-21 19:44:13,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-21 19:44:13,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:13,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:44:13,583 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) 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 [2021-10-21 19:44:13,586 INFO L168 Benchmark]: Toolchain (without parser) took 93451.33 ms. Allocated memory was 54.5 MB in the beginning and 146.8 MB in the end (delta: 92.3 MB). Free memory was 31.0 MB in the beginning and 51.4 MB in the end (delta: -20.4 MB). Peak memory consumption was 71.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:44:13,587 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:44:13,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.88 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.8 MB in the beginning and 42.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:44:13,588 INFO L168 Benchmark]: Boogie Preprocessor took 124.07 ms. Allocated memory is still 69.2 MB. Free memory was 42.0 MB in the beginning and 38.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:44:13,589 INFO L168 Benchmark]: RCFGBuilder took 896.03 ms. Allocated memory is still 69.2 MB. Free memory was 38.5 MB in the beginning and 44.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:44:13,589 INFO L168 Benchmark]: TraceAbstraction took 91707.03 ms. Allocated memory was 69.2 MB in the beginning and 146.8 MB in the end (delta: 77.6 MB). Free memory was 44.1 MB in the beginning and 51.4 MB in the end (delta: -7.3 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:44:13,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 715.88 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.8 MB in the beginning and 42.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 124.07 ms. Allocated memory is still 69.2 MB. Free memory was 42.0 MB in the beginning and 38.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 896.03 ms. Allocated memory is still 69.2 MB. Free memory was 38.5 MB in the beginning and 44.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 91707.03 ms. Allocated memory was 69.2 MB in the beginning and 146.8 MB in the end (delta: 77.6 MB). Free memory was 44.1 MB in the beginning and 51.4 MB in the end (delta: -7.3 MB). Peak memory consumption was 71.0 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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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_308c7575-65d1-450f-abf6-528b3077624d/bin/uautomizer-j4sWxH34Be/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...