./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt --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 b34e199f0da2018b0ae97fc3f9a24725315a1b16 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt --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 b34e199f0da2018b0ae97fc3f9a24725315a1b16 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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-4e77c04 [2021-10-13 00:44:51,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:44:51,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:44:52,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:44:52,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:44:52,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:44:52,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:44:52,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:44:52,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:44:52,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:44:52,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:44:52,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:44:52,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:44:52,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:44:52,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:44:52,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:44:52,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:44:52,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:44:52,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:44:52,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:44:52,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:44:52,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:44:52,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:44:52,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:44:52,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:44:52,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:44:52,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:44:52,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:44:52,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:44:52,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:44:52,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:44:52,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:44:52,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:44:52,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:44:52,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:44:52,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:44:52,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:44:52,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:44:52,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:44:52,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:44:52,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:44:52,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:44:52,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:44:52,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:44:52,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:44:52,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:44:52,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:44:52,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:44:52,183 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:44:52,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:44:52,184 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:44:52,184 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:44:52,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:44:52,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:44:52,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:44:52,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:44:52,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:44:52,187 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:44:52,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:44:52,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:44:52,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:44:52,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:44:52,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:44:52,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:44:52,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:44:52,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:44:52,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:44:52,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:44:52,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:44:52,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:44:52,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:44:52,193 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b34e199f0da2018b0ae97fc3f9a24725315a1b16 [2021-10-13 00:44:52,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:44:52,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:44:52,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:44:52,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:44:52,598 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:44:52,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-13 00:44:52,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/4238ed3b9/b03c5758cafc4428980524ccff5464a5/FLAG5f68fcad4 [2021-10-13 00:44:53,394 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:44:53,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-13 00:44:53,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/4238ed3b9/b03c5758cafc4428980524ccff5464a5/FLAG5f68fcad4 [2021-10-13 00:44:53,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/4238ed3b9/b03c5758cafc4428980524ccff5464a5 [2021-10-13 00:44:53,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:44:53,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:44:53,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:44:53,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:44:53,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:44:53,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:44:53" (1/1) ... [2021-10-13 00:44:53,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d616aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:53, skipping insertion in model container [2021-10-13 00:44:53,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:44:53" (1/1) ... [2021-10-13 00:44:53,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:44:53,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:44:54,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:44:54,325 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:44:54,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:44:54,449 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:44:54,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54 WrapperNode [2021-10-13 00:44:54,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:44:54,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:44:54,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:44:54,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:44:54,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:44:54,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:44:54,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:44:54,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:44:54,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (1/1) ... [2021-10-13 00:44:54,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:44:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:44:54,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:44:54,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:44:54,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:44:54,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:44:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-13 00:44:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:44:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:44:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-13 00:44:54,712 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-13 00:44:54,712 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-13 00:44:54,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:44:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:44:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:44:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:44:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:44:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:44:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:44:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:44:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:44:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:44:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:44:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:44:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:44:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:44:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:44:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:44:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:44:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:44:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:44:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:44:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:44:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:44:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:44:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:44:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:44:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:44:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:44:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:44:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:44:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:44:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:44:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:44:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:44:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:44:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:44:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:44:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:44:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:44:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:44:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:44:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:44:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:44:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:44:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:44:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:44:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:44:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:44:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:44:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:44:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:44:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:44:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:44:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:44:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:44:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:44:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:44:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:44:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:44:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:44:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:44:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:44:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:44:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:44:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:44:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:44:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:44:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:44:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:44:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:44:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:44:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:44:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:44:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:44:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:44:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:44:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:44:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:44:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:44:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:44:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:44:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:44:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:44:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:44:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:44:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:44:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:44:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:44:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:44:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:44:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:44:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:44:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:44:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:44:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:44:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:44:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:44:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:44:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:44:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:44:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:44:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:44:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-13 00:44:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-13 00:44:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-13 00:44:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-13 00:44:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-13 00:44:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-13 00:44:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-13 00:44:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-13 00:44:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-13 00:44:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-13 00:44:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-13 00:44:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-13 00:44:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-13 00:44:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-13 00:44:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-13 00:44:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-13 00:44:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-13 00:44:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-13 00:44:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-13 00:44:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-13 00:44:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-13 00:44:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-13 00:44:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-13 00:44:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-13 00:44:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-13 00:44:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-13 00:44:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-13 00:44:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-13 00:44:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-13 00:44:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-13 00:44:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-13 00:44:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-13 00:44:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-13 00:44:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-13 00:44:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-13 00:44:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-13 00:44:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-13 00:44:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-13 00:44:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-13 00:44:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-13 00:44:54,746 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-13 00:44:54,746 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-13 00:44:54,746 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-13 00:44:54,746 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-13 00:44:54,747 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-13 00:44:54,747 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-13 00:44:54,747 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-13 00:44:54,747 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-13 00:44:54,747 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-13 00:44:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:44:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-13 00:44:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-13 00:44:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:44:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:44:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:44:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:44:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:44:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:44:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:44:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 00:44:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:44:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:44:54,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:44:55,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:44:55,576 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-13 00:44:55,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:44:55 BoogieIcfgContainer [2021-10-13 00:44:55,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:44:55,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:44:55,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:44:55,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:44:55,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:44:53" (1/3) ... [2021-10-13 00:44:55,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668a6b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:44:55, skipping insertion in model container [2021-10-13 00:44:55,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:44:54" (2/3) ... [2021-10-13 00:44:55,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668a6b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:44:55, skipping insertion in model container [2021-10-13 00:44:55,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:44:55" (3/3) ... [2021-10-13 00:44:55,591 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-10-13 00:44:55,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:44:55,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 00:44:55,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:44:55,663 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, mConcurrency=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 [2021-10-13 00:44:55,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 00:44:55,685 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) [2021-10-13 00:44:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:44:55,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:55,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:55,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:44:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1583989328, now seen corresponding path program 1 times [2021-10-13 00:44:55,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:55,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152187586] [2021-10-13 00:44:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:55,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:44:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:44:56,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:44:56,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152187586] [2021-10-13 00:44:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152187586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:44:56,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:44:56,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:44:56,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998182238] [2021-10-13 00:44:56,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:44:56,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:44:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:44:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:44:56,313 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) [2021-10-13 00:44:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:56,939 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2021-10-13 00:44:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:44:56,941 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 [2021-10-13 00:44:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:56,959 INFO L225 Difference]: With dead ends: 97 [2021-10-13 00:44:56,959 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 00:44:56,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:44:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 00:44:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-10-13 00:44:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 64 states have internal predecessors, (71), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2021-10-13 00:44:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-10-13 00:44:57,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 9 [2021-10-13 00:44:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:57,056 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-10-13 00:44:57,056 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) [2021-10-13 00:44:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-10-13 00:44:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:44:57,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:57,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:57,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:44:57,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:44:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:57,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1583989329, now seen corresponding path program 1 times [2021-10-13 00:44:57,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:57,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152405008] [2021-10-13 00:44:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:57,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:57,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:44:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:44:57,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:44:57,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152405008] [2021-10-13 00:44:57,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152405008] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:44:57,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:44:57,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:44:57,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170063646] [2021-10-13 00:44:57,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:44:57,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:44:57,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:44:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:44:57,359 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:58,200 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2021-10-13 00:44:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:44:58,201 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 [2021-10-13 00:44:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:58,205 INFO L225 Difference]: With dead ends: 165 [2021-10-13 00:44:58,205 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 00:44:58,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:44:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 00:44:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-10-13 00:44:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 106 states have internal predecessors, (141), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (35), 16 states have call predecessors, (35), 15 states have call successors, (35) [2021-10-13 00:44:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 192 transitions. [2021-10-13 00:44:58,232 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 192 transitions. Word has length 9 [2021-10-13 00:44:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 192 transitions. [2021-10-13 00:44:58,233 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) [2021-10-13 00:44:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 192 transitions. [2021-10-13 00:44:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:44:58,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:58,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:44:58,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:44:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:58,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1859028932, now seen corresponding path program 1 times [2021-10-13 00:44:58,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:58,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293523943] [2021-10-13 00:44:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:58,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:44:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:44:58,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:44:58,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293523943] [2021-10-13 00:44:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293523943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:44:58,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:44:58,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:44:58,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121016020] [2021-10-13 00:44:58,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:44:58,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:44:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:44:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:44:58,843 INFO L87 Difference]: Start difference. First operand 134 states and 192 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:59,882 INFO L93 Difference]: Finished difference Result 246 states and 348 transitions. [2021-10-13 00:44:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:44:59,883 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 [2021-10-13 00:44:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:59,893 INFO L225 Difference]: With dead ends: 246 [2021-10-13 00:44:59,893 INFO L226 Difference]: Without dead ends: 246 [2021-10-13 00:44:59,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:44:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-13 00:44:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2021-10-13 00:44:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.6176470588235294) internal successors, (220), 156 states have internal predecessors, (220), 20 states have call successors, (20), 16 states have call predecessors, (20), 18 states have return successors, (43), 19 states have call predecessors, (43), 19 states have call successors, (43) [2021-10-13 00:44:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 283 transitions. [2021-10-13 00:44:59,936 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 283 transitions. Word has length 10 [2021-10-13 00:44:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:59,936 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 283 transitions. [2021-10-13 00:44:59,937 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) [2021-10-13 00:44:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 283 transitions. [2021-10-13 00:44:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:44:59,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:59,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:59,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:44:59,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:44:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1795322128, now seen corresponding path program 1 times [2021-10-13 00:44:59,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:59,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85842321] [2021-10-13 00:44:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:59,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:00,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:00,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85842321] [2021-10-13 00:45:00,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85842321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:45:00,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:45:00,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:45:00,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24392532] [2021-10-13 00:45:00,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:45:00,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:45:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:45:00,426 INFO L87 Difference]: Start difference. First operand 192 states and 283 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:45:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:45:01,616 INFO L93 Difference]: Finished difference Result 226 states and 305 transitions. [2021-10-13 00:45:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:45:01,618 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 [2021-10-13 00:45:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:45:01,621 INFO L225 Difference]: With dead ends: 226 [2021-10-13 00:45:01,621 INFO L226 Difference]: Without dead ends: 226 [2021-10-13 00:45:01,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:45:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-13 00:45:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2021-10-13 00:45:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.6029411764705883) internal successors, (218), 156 states have internal predecessors, (218), 20 states have call successors, (20), 16 states have call predecessors, (20), 18 states have return successors, (43), 19 states have call predecessors, (43), 19 states have call successors, (43) [2021-10-13 00:45:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 281 transitions. [2021-10-13 00:45:01,651 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 281 transitions. Word has length 11 [2021-10-13 00:45:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:45:01,651 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 281 transitions. [2021-10-13 00:45:01,652 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) [2021-10-13 00:45:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 281 transitions. [2021-10-13 00:45:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:45:01,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:45:01,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:45:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:45:01,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:45:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:45:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash -179588794, now seen corresponding path program 1 times [2021-10-13 00:45:01,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:45:01,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90700181] [2021-10-13 00:45:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:01,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:45:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:01,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:01,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90700181] [2021-10-13 00:45:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90700181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:45:01,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:45:01,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:45:01,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114067462] [2021-10-13 00:45:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:45:01,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:45:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:45:01,869 INFO L87 Difference]: Start difference. First operand 192 states and 281 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:45:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:45:02,934 INFO L93 Difference]: Finished difference Result 271 states and 367 transitions. [2021-10-13 00:45:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:45:02,941 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 [2021-10-13 00:45:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:45:02,946 INFO L225 Difference]: With dead ends: 271 [2021-10-13 00:45:02,946 INFO L226 Difference]: Without dead ends: 271 [2021-10-13 00:45:02,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:45:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-13 00:45:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 223. [2021-10-13 00:45:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.5818181818181818) internal successors, (261), 186 states have internal predecessors, (261), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-13 00:45:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 325 transitions. [2021-10-13 00:45:03,024 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 325 transitions. Word has length 12 [2021-10-13 00:45:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:45:03,025 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 325 transitions. [2021-10-13 00:45:03,025 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) [2021-10-13 00:45:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 325 transitions. [2021-10-13 00:45:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:45:03,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:45:03,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:45:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:45:03,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:45:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:45:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1272285230, now seen corresponding path program 1 times [2021-10-13 00:45:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:45:03,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795428787] [2021-10-13 00:45:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:03,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:45:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:03,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:03,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:03,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795428787] [2021-10-13 00:45:03,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795428787] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:45:03,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:45:03,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:45:03,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628089032] [2021-10-13 00:45:03,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:45:03,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:45:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:45:03,315 INFO L87 Difference]: Start difference. First operand 223 states and 325 transitions. Second operand has 7 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:45:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:45:04,287 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2021-10-13 00:45:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:45:04,287 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 [2021-10-13 00:45:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:45:04,290 INFO L225 Difference]: With dead ends: 255 [2021-10-13 00:45:04,291 INFO L226 Difference]: Without dead ends: 255 [2021-10-13 00:45:04,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:45:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-13 00:45:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-10-13 00:45:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.5696969696969696) internal successors, (259), 186 states have internal predecessors, (259), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-13 00:45:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 323 transitions. [2021-10-13 00:45:04,312 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 323 transitions. Word has length 13 [2021-10-13 00:45:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:45:04,312 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 323 transitions. [2021-10-13 00:45:04,313 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) [2021-10-13 00:45:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 323 transitions. [2021-10-13 00:45:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:45:04,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:45:04,314 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:45:04,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:45:04,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:45:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:45:04,316 INFO L82 PathProgramCache]: Analyzing trace with hash 668439832, now seen corresponding path program 1 times [2021-10-13 00:45:04,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:45:04,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805989387] [2021-10-13 00:45:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:04,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:45:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:04,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:04,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805989387] [2021-10-13 00:45:04,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805989387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:04,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303583995] [2021-10-13 00:45:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:04,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:45:04,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:45:04,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:45:04,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:45:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:45:04,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:45:05,038 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-13 00:45:05,040 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 [2021-10-13 00:45:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303583995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:05,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:45:05,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-13 00:45:05,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235748591] [2021-10-13 00:45:05,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:45:05,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:45:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:45:05,366 INFO L87 Difference]: Start difference. First operand 223 states and 323 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:45:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:45:06,375 INFO L93 Difference]: Finished difference Result 257 states and 343 transitions. [2021-10-13 00:45:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:45:06,376 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 [2021-10-13 00:45:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:45:06,379 INFO L225 Difference]: With dead ends: 257 [2021-10-13 00:45:06,379 INFO L226 Difference]: Without dead ends: 257 [2021-10-13 00:45:06,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:45:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-13 00:45:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 227. [2021-10-13 00:45:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 190 states have internal predecessors, (255), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-13 00:45:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 319 transitions. [2021-10-13 00:45:06,398 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 319 transitions. Word has length 17 [2021-10-13 00:45:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:45:06,398 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 319 transitions. [2021-10-13 00:45:06,399 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) [2021-10-13 00:45:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 319 transitions. [2021-10-13 00:45:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:45:06,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:45:06,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:45:06,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:45:06,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:45:06,625 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:45:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:45:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -753201699, now seen corresponding path program 1 times [2021-10-13 00:45:06,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:45:06,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402232825] [2021-10-13 00:45:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:06,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:45:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:07,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:07,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:07,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402232825] [2021-10-13 00:45:07,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402232825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:07,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595978856] [2021-10-13 00:45:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:07,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:45:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:45:07,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:45:07,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:45:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:45:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:45:07,542 INFO L354 Elim1Store]: treesize reduction 497, result has 11.1 percent of original size [2021-10-13 00:45:07,543 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 [2021-10-13 00:45:20,439 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 [2021-10-13 00:45:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595978856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:21,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:45:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-13 00:45:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186738419] [2021-10-13 00:45:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:45:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:45:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:45:21,264 INFO L87 Difference]: Start difference. First operand 227 states and 319 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:45:45,858 WARN L207 SmtUtils]: Spent 12.92 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2021-10-13 00:45:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:45:52,646 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2021-10-13 00:45:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:45:52,647 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 [2021-10-13 00:45:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:45:52,651 INFO L225 Difference]: With dead ends: 283 [2021-10-13 00:45:52,651 INFO L226 Difference]: Without dead ends: 283 [2021-10-13 00:45:52,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 19281.5ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:45:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-13 00:45:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-10-13 00:45:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.497142857142857) internal successors, (262), 196 states have internal predecessors, (262), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-13 00:45:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 326 transitions. [2021-10-13 00:45:52,669 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 326 transitions. Word has length 18 [2021-10-13 00:45:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:45:52,670 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 326 transitions. [2021-10-13 00:45:52,670 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) [2021-10-13 00:45:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 326 transitions. [2021-10-13 00:45:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:45:52,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:45:52,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:45:52,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:45:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 00:45:52,885 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:45:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:45:52,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1874416105, now seen corresponding path program 1 times [2021-10-13 00:45:52,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:45:52,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025967173] [2021-10-13 00:45:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:52,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:45:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:45:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:53,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:45:53,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025967173] [2021-10-13 00:45:53,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025967173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:53,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036001203] [2021-10-13 00:45:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:45:53,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:45:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:45:53,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:45:53,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:45:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:45:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:45:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:45:54,014 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-10-13 00:45:54,014 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 [2021-10-13 00:45:54,022 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 [2021-10-13 00:45:57,971 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 [2021-10-13 00:45:57,979 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 [2021-10-13 00:45:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:45:59,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036001203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:45:59,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:45:59,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-13 00:45:59,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815475552] [2021-10-13 00:45:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:45:59,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:45:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:45:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:45:59,403 INFO L87 Difference]: Start difference. First operand 233 states and 326 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:46:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:01,474 INFO L93 Difference]: Finished difference Result 262 states and 347 transitions. [2021-10-13 00:46:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:46:01,475 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 [2021-10-13 00:46:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:01,478 INFO L225 Difference]: With dead ends: 262 [2021-10-13 00:46:01,478 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 00:46:01,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1067.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:46:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 00:46:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 233. [2021-10-13 00:46:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.48) internal successors, (259), 196 states have internal predecessors, (259), 20 states have call successors, (20), 17 states have call predecessors, (20), 20 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2021-10-13 00:46:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2021-10-13 00:46:01,500 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 19 [2021-10-13 00:46:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2021-10-13 00:46:01,501 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) [2021-10-13 00:46:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2021-10-13 00:46:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:46:01,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:01,503 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] [2021-10-13 00:46:01,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:46:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:46:01,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting c2Err0ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 550415913, now seen corresponding path program 1 times [2021-10-13 00:46:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:01,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52842879] [2021-10-13 00:46:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:01,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:46:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:01,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:01,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52842879] [2021-10-13 00:46:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52842879] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:01,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:01,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:46:01,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842440785] [2021-10-13 00:46:01,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:46:01,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:46:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:46:01,848 INFO L87 Difference]: Start difference. First operand 233 states and 323 transitions. Second operand has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:46:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:02,204 INFO L93 Difference]: Finished difference Result 331 states and 471 transitions. [2021-10-13 00:46:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:46:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 00:46:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:02,213 INFO L225 Difference]: With dead ends: 331 [2021-10-13 00:46:02,213 INFO L226 Difference]: Without dead ends: 331 [2021-10-13 00:46:02,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-13 00:46:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 312. [2021-10-13 00:46:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 238 states have (on average 1.5) internal successors, (357), 261 states have internal predecessors, (357), 28 states have call successors, (28), 24 states have call predecessors, (28), 28 states have return successors, (76), 26 states have call predecessors, (76), 27 states have call successors, (76) [2021-10-13 00:46:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 461 transitions. [2021-10-13 00:46:02,230 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 461 transitions. Word has length 23 [2021-10-13 00:46:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:02,231 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 461 transitions. [2021-10-13 00:46:02,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:46:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 461 transitions. [2021-10-13 00:46:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:46:02,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:02,233 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] [2021-10-13 00:46:02,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:46:02,233 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting c2Err3ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash 550416137, now seen corresponding path program 1 times [2021-10-13 00:46:02,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:02,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866135383] [2021-10-13 00:46:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:02,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:02,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:46:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:02,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:02,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866135383] [2021-10-13 00:46:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866135383] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:02,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:02,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:46:02,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128457304] [2021-10-13 00:46:02,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:46:02,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:46:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:46:02,352 INFO L87 Difference]: Start difference. First operand 312 states and 461 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:46:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:02,697 INFO L93 Difference]: Finished difference Result 369 states and 522 transitions. [2021-10-13 00:46:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:46:02,698 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 [2021-10-13 00:46:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:02,701 INFO L225 Difference]: With dead ends: 369 [2021-10-13 00:46:02,701 INFO L226 Difference]: Without dead ends: 369 [2021-10-13 00:46:02,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-13 00:46:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2021-10-13 00:46:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.4868913857677903) internal successors, (397), 291 states have internal predecessors, (397), 32 states have call successors, (32), 28 states have call predecessors, (32), 34 states have return successors, (85), 31 states have call predecessors, (85), 31 states have call successors, (85) [2021-10-13 00:46:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 514 transitions. [2021-10-13 00:46:02,718 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 514 transitions. Word has length 23 [2021-10-13 00:46:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:02,719 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 514 transitions. [2021-10-13 00:46:02,719 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) [2021-10-13 00:46:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 514 transitions. [2021-10-13 00:46:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:46:02,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:02,720 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, 1] [2021-10-13 00:46:02,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:46:02,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting c2Err1ASSERT_VIOLATIONMEMORY_FREE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash -116975829, now seen corresponding path program 1 times [2021-10-13 00:46:02,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:02,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060358541] [2021-10-13 00:46:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:02,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:46:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:02,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:02,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060358541] [2021-10-13 00:46:02,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060358541] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:02,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:02,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:46:02,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445045070] [2021-10-13 00:46:02,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:46:02,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:46:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:46:02,845 INFO L87 Difference]: Start difference. First operand 351 states and 514 transitions. Second operand has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:46:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:03,231 INFO L93 Difference]: Finished difference Result 366 states and 518 transitions. [2021-10-13 00:46:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:46:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 00:46:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:03,235 INFO L225 Difference]: With dead ends: 366 [2021-10-13 00:46:03,235 INFO L226 Difference]: Without dead ends: 366 [2021-10-13 00:46:03,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-13 00:46:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 351. [2021-10-13 00:46:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.4794007490636705) internal successors, (395), 291 states have internal predecessors, (395), 32 states have call successors, (32), 28 states have call predecessors, (32), 34 states have return successors, (85), 31 states have call predecessors, (85), 31 states have call successors, (85) [2021-10-13 00:46:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 512 transitions. [2021-10-13 00:46:03,253 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 512 transitions. Word has length 24 [2021-10-13 00:46:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:03,255 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 512 transitions. [2021-10-13 00:46:03,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:46:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 512 transitions. [2021-10-13 00:46:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:46:03,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:03,260 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] [2021-10-13 00:46:03,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 00:46:03,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash 35178027, now seen corresponding path program 1 times [2021-10-13 00:46:03,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:03,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464556592] [2021-10-13 00:46:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:03,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:46:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 00:46:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:46:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:46:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:03,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:03,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464556592] [2021-10-13 00:46:03,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464556592] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:03,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:03,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:46:03,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816006845] [2021-10-13 00:46:03,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:46:03,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:46:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:03,400 INFO L87 Difference]: Start difference. First operand 351 states and 512 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:46:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:03,580 INFO L93 Difference]: Finished difference Result 260 states and 360 transitions. [2021-10-13 00:46:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:46:03,581 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 [2021-10-13 00:46:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:03,583 INFO L225 Difference]: With dead ends: 260 [2021-10-13 00:46:03,583 INFO L226 Difference]: Without dead ends: 260 [2021-10-13 00:46:03,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-13 00:46:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-10-13 00:46:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 196 states have (on average 1.4540816326530612) internal successors, (285), 216 states have internal predecessors, (285), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (47), 19 states have call predecessors, (47), 23 states have call successors, (47) [2021-10-13 00:46:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 356 transitions. [2021-10-13 00:46:03,595 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 356 transitions. Word has length 33 [2021-10-13 00:46:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:03,596 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 356 transitions. [2021-10-13 00:46:03,596 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) [2021-10-13 00:46:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 356 transitions. [2021-10-13 00:46:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:46:03,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:03,598 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] [2021-10-13 00:46:03,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 00:46:03,598 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -138461554, now seen corresponding path program 1 times [2021-10-13 00:46:03,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:03,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147571390] [2021-10-13 00:46:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:03,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:46:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 00:46:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 00:46:03,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:03,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147571390] [2021-10-13 00:46:03,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147571390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:46:03,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145610089] [2021-10-13 00:46:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:03,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:46:03,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:46:03,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:46:03,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:46:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:46:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:46:04,328 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-13 00:46:04,328 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 [2021-10-13 00:46:06,242 INFO L354 Elim1Store]: treesize reduction 120, result has 29.0 percent of original size [2021-10-13 00:46:06,243 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 [2021-10-13 00:46:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 00:46:09,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145610089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:46:09,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:46:09,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-10-13 00:46:09,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403928973] [2021-10-13 00:46:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:46:09,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:46:09,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:46:09,150 INFO L87 Difference]: Start difference. First operand 257 states and 356 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-13 00:46:21,103 WARN L207 SmtUtils]: Spent 10.49 s on a formula simplification that was a NOOP. DAG size: 97 [2021-10-13 00:46:33,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-13 00:46:33,832 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-13 00:46:33,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:46:34,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 00:46:34,034 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-10-13 00:46:34,039 INFO L168 Benchmark]: Toolchain (without parser) took 100346.42 ms. Allocated memory was 109.1 MB in the beginning and 172.0 MB in the end (delta: 62.9 MB). Free memory was 75.8 MB in the beginning and 112.8 MB in the end (delta: -37.0 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:34,040 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:46:34,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 750.82 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 75.5 MB in the beginning and 106.5 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:34,041 INFO L168 Benchmark]: Boogie Preprocessor took 151.28 ms. Allocated memory is still 142.6 MB. Free memory was 106.5 MB in the beginning and 102.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:34,041 INFO L168 Benchmark]: RCFGBuilder took 976.09 ms. Allocated memory is still 142.6 MB. Free memory was 102.9 MB in the beginning and 77.2 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:34,042 INFO L168 Benchmark]: TraceAbstraction took 98456.98 ms. Allocated memory was 142.6 MB in the beginning and 172.0 MB in the end (delta: 29.4 MB). Free memory was 77.2 MB in the beginning and 112.8 MB in the end (delta: -35.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:46:34,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 750.82 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 75.5 MB in the beginning and 106.5 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 151.28 ms. Allocated memory is still 142.6 MB. Free memory was 106.5 MB in the beginning and 102.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 976.09 ms. Allocated memory is still 142.6 MB. Free memory was 102.9 MB in the beginning and 77.2 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 98456.98 ms. Allocated memory was 142.6 MB in the beginning and 172.0 MB in the end (delta: 29.4 MB). Free memory was 77.2 MB in the beginning and 112.8 MB in the end (delta: -35.7 MB). There was no memory consumed. 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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-4e77c04 [2021-10-13 00:46:36,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:46:36,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:46:36,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 00:46:36,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:46:36,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:46:36,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:46:36,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:46:36,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:46:36,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:46:36,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:46:36,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:46:36,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:46:36,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:46:36,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:46:36,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:46:36,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 00:46:36,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:46:36,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:46:36,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:46:36,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 00:46:36,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:46:36,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:46:36,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:46:36,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:46:36,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:46:36,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:46:36,761 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:46:36,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:46:36,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:46:36,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:46:36,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:46:36,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:46:36,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:46:36,763 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:46:36,763 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:46:36,764 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:46:36,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:46:36,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:46:36,765 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:46:36,765 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:46:36,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:46:36,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:46:36,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:46:36,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:46:36,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:46:36,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:46:36,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:46:36,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:46:36,768 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:46:36,768 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:46:36,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:46:36,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:46:36,769 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b34e199f0da2018b0ae97fc3f9a24725315a1b16 [2021-10-13 00:46:37,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:46:37,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:46:37,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:46:37,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:46:37,260 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:46:37,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-13 00:46:37,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/855195c36/0cf354202da04036be0f92040ea04d7c/FLAG3b0d0427a [2021-10-13 00:46:38,110 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:46:38,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-10-13 00:46:38,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/855195c36/0cf354202da04036be0f92040ea04d7c/FLAG3b0d0427a [2021-10-13 00:46:38,338 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/data/855195c36/0cf354202da04036be0f92040ea04d7c [2021-10-13 00:46:38,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:46:38,345 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:46:38,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:46:38,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:46:38,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:46:38,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:46:38" (1/1) ... [2021-10-13 00:46:38,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c662a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:38, skipping insertion in model container [2021-10-13 00:46:38,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:46:38" (1/1) ... [2021-10-13 00:46:38,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:46:38,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:46:39,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:46:39,099 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:46:39,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:46:39,230 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:46:39,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39 WrapperNode [2021-10-13 00:46:39,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:46:39,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:46:39,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:46:39,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:46:39,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:46:39,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:46:39,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:46:39,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:46:39,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (1/1) ... [2021-10-13 00:46:39,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:46:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:46:39,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:46:39,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:46:39,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:46:39,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:46:39,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2021-10-13 00:46:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:46:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:46:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:46:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-10-13 00:46:39,528 INFO L138 BoogieDeclarations]: Found implementation of procedure c1 [2021-10-13 00:46:39,529 INFO L138 BoogieDeclarations]: Found implementation of procedure c2 [2021-10-13 00:46:39,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:46:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:46:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:46:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:46:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:46:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:46:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:46:39,531 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:46:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:46:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:46:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:46:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:46:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:46:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:46:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:46:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:46:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:46:39,533 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:46:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:46:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:46:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:46:39,534 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:46:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:46:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:46:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:46:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:46:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:46:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:46:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:46:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:46:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:46:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:46:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:46:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:46:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:46:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:46:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:46:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:46:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:46:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:46:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:46:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:46:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:46:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:46:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:46:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:46:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:46:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:46:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:46:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:46:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:46:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:46:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:46:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:46:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:46:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:46:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:46:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:46:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:46:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:46:39,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:46:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:46:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:46:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:46:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:46:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:46:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:46:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:46:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:46:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:46:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:46:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:46:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:46:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:46:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:46:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:46:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:46:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:46:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:46:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:46:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:46:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:46:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:46:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:46:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:46:39,554 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:46:39,555 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:46:39,556 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:46:39,556 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:46:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:46:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:46:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:46:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:46:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:46:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:46:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:46:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:46:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:46:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:46:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-10-13 00:46:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-10-13 00:46:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-10-13 00:46:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-10-13 00:46:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-10-13 00:46:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-10-13 00:46:39,561 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-10-13 00:46:39,562 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-10-13 00:46:39,562 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-10-13 00:46:39,562 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-10-13 00:46:39,563 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-10-13 00:46:39,564 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-10-13 00:46:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-10-13 00:46:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-10-13 00:46:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-10-13 00:46:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-10-13 00:46:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-10-13 00:46:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-10-13 00:46:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-10-13 00:46:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-10-13 00:46:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-10-13 00:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-10-13 00:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-10-13 00:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-10-13 00:46:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-10-13 00:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-10-13 00:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-10-13 00:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-10-13 00:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-10-13 00:46:39,579 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-10-13 00:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-10-13 00:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-10-13 00:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2021-10-13 00:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-10-13 00:46:39,580 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-10-13 00:46:39,581 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-10-13 00:46:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-10-13 00:46:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-10-13 00:46:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-10-13 00:46:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-10-13 00:46:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-10-13 00:46:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-10-13 00:46:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure c1 [2021-10-13 00:46:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure c2 [2021-10-13 00:46:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:46:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:46:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:46:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:46:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:46:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 00:46:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:46:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:46:39,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 00:46:39,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:46:40,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:46:40,437 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-13 00:46:40,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:46:40 BoogieIcfgContainer [2021-10-13 00:46:40,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:46:40,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:46:40,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:46:40,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:46:40,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:46:38" (1/3) ... [2021-10-13 00:46:40,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494caa85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:46:40, skipping insertion in model container [2021-10-13 00:46:40,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:39" (2/3) ... [2021-10-13 00:46:40,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494caa85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:46:40, skipping insertion in model container [2021-10-13 00:46:40,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:46:40" (3/3) ... [2021-10-13 00:46:40,450 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-10-13 00:46:40,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:46:40,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-13 00:46:40,512 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:46:40,520 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, mConcurrency=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 [2021-10-13 00:46:40,528 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 00:46:40,550 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) [2021-10-13 00:46:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:46:40,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:40,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:40,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1137100954, now seen corresponding path program 1 times [2021-10-13 00:46:40,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:46:40,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363482911] [2021-10-13 00:46:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:40,587 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:46:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:46:40,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:46:40,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:46:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:46:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:46:41,344 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-13 00:46:41,345 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 [2021-10-13 00:46:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:42,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:46:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:42,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:46:42,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363482911] [2021-10-13 00:46:42,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363482911] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:42,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:42,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:46:42,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96292865] [2021-10-13 00:46:42,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:46:42,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:46:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:46:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:46:42,466 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) [2021-10-13 00:46:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:42,645 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-10-13 00:46:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:46:42,647 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 [2021-10-13 00:46:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:42,658 INFO L225 Difference]: With dead ends: 88 [2021-10-13 00:46:42,659 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 00:46:42,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:46:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 00:46:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-10-13 00:46:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 60 states have internal predecessors, (69), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 00:46:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-10-13 00:46:42,713 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 9 [2021-10-13 00:46:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:42,713 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-10-13 00:46:42,714 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) [2021-10-13 00:46:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-10-13 00:46:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:46:42,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:42,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:42,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:46:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:46:42,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1137100953, now seen corresponding path program 1 times [2021-10-13 00:46:42,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:46:42,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465997775] [2021-10-13 00:46:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:42,934 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:46:42,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:46:42,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:46:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:46:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:46:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:46:43,466 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-10-13 00:46:43,467 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 [2021-10-13 00:46:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:43,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:46:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:44,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:46:44,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465997775] [2021-10-13 00:46:44,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465997775] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:44,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:44,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 00:46:44,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747850993] [2021-10-13 00:46:44,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:46:44,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:46:44,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:46:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:46:44,088 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:46:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:44,892 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2021-10-13 00:46:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:46:44,893 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 [2021-10-13 00:46:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:46:44,896 INFO L225 Difference]: With dead ends: 164 [2021-10-13 00:46:44,897 INFO L226 Difference]: Without dead ends: 164 [2021-10-13 00:46:44,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:46:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-13 00:46:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2021-10-13 00:46:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.625) internal successors, (143), 105 states have internal predecessors, (143), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2021-10-13 00:46:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 187 transitions. [2021-10-13 00:46:44,955 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 187 transitions. Word has length 9 [2021-10-13 00:46:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:46:44,956 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 187 transitions. [2021-10-13 00:46:44,957 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) [2021-10-13 00:46:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 187 transitions. [2021-10-13 00:46:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:46:44,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:46:44,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:44,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:46:45,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:46:45,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:46:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:45,175 INFO L82 PathProgramCache]: Analyzing trace with hash -890391164, now seen corresponding path program 1 times [2021-10-13 00:46:45,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:46:45,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608694250] [2021-10-13 00:46:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:45,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:46:45,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:46:45,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:46:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:46:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:46:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:46:45,956 INFO L354 Elim1Store]: treesize reduction 463, result has 13.5 percent of original size [2021-10-13 00:46:45,957 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 [2021-10-13 00:46:52,586 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-10-13 00:46:52,587 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 [2021-10-13 00:47:04,296 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 [2021-10-13 00:47:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:06,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:47:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:07,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:47:07,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608694250] [2021-10-13 00:47:07,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608694250] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:47:07,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:47:07,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 00:47:07,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911215491] [2021-10-13 00:47:07,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:47:07,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:47:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:47:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:47:07,166 INFO L87 Difference]: Start difference. First operand 132 states and 187 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:47:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:47:09,917 INFO L93 Difference]: Finished difference Result 245 states and 348 transitions. [2021-10-13 00:47:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:47:09,918 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 [2021-10-13 00:47:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:47:09,924 INFO L225 Difference]: With dead ends: 245 [2021-10-13 00:47:09,924 INFO L226 Difference]: Without dead ends: 245 [2021-10-13 00:47:09,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1648.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:47:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-13 00:47:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-10-13 00:47:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.618705035971223) internal successors, (225), 156 states have internal predecessors, (225), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (39), 19 states have call predecessors, (39), 19 states have call successors, (39) [2021-10-13 00:47:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 284 transitions. [2021-10-13 00:47:09,952 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 284 transitions. Word has length 10 [2021-10-13 00:47:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:47:09,953 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 284 transitions. [2021-10-13 00:47:09,953 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) [2021-10-13 00:47:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 284 transitions. [2021-10-13 00:47:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:47:09,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:47:09,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:47:09,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:47:10,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:47:10,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:47:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:47:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1832322202, now seen corresponding path program 1 times [2021-10-13 00:47:10,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:47:10,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899420155] [2021-10-13 00:47:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:47:10,163 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:47:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:47:10,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:47:10,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:47:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:47:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:47:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:47:10,814 INFO L354 Elim1Store]: treesize reduction 336, result has 13.8 percent of original size [2021-10-13 00:47:10,814 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 [2021-10-13 00:47:10,827 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:47:10,828 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 [2021-10-13 00:47:14,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:47:14,476 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-13 00:47:14,476 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 [2021-10-13 00:47:21,463 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 [2021-10-13 00:47:21,477 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 [2021-10-13 00:47:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:47:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:26,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:47:26,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899420155] [2021-10-13 00:47:26,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899420155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:47:26,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:47:26,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 00:47:26,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798946795] [2021-10-13 00:47:26,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:47:26,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:47:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:47:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:47:26,359 INFO L87 Difference]: Start difference. First operand 192 states and 284 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:47:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:47:28,826 INFO L93 Difference]: Finished difference Result 337 states and 445 transitions. [2021-10-13 00:47:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:47:28,828 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 [2021-10-13 00:47:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:47:28,832 INFO L225 Difference]: With dead ends: 337 [2021-10-13 00:47:28,832 INFO L226 Difference]: Without dead ends: 337 [2021-10-13 00:47:28,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:47:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-13 00:47:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 268. [2021-10-13 00:47:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 196 states have (on average 1.5765306122448979) internal successors, (309), 218 states have internal predecessors, (309), 27 states have call successors, (27), 21 states have call predecessors, (27), 27 states have return successors, (62), 28 states have call predecessors, (62), 26 states have call successors, (62) [2021-10-13 00:47:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 398 transitions. [2021-10-13 00:47:28,870 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 398 transitions. Word has length 11 [2021-10-13 00:47:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:47:28,870 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 398 transitions. [2021-10-13 00:47:28,871 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) [2021-10-13 00:47:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 398 transitions. [2021-10-13 00:47:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:47:28,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:47:28,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:47:28,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:47:29,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:47:29,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [c2Err0ASSERT_VIOLATIONMEMORY_FREE, c2Err1ASSERT_VIOLATIONMEMORY_FREE, c2Err2ASSERT_VIOLATIONMEMORY_FREE, c2Err3ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 00:47:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:47:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash -967413306, now seen corresponding path program 1 times [2021-10-13 00:47:29,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:47:29,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308939200] [2021-10-13 00:47:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:47:29,083 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:47:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:47:29,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:47:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:47:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:47:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:47:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:47:29,637 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-10-13 00:47:29,637 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 [2021-10-13 00:47:32,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:47:32,970 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 [2021-10-13 00:47:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:47:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:47:43,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:47:43,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308939200] [2021-10-13 00:47:43,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308939200] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:47:43,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:47:43,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 00:47:43,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878837538] [2021-10-13 00:47:43,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:47:43,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:47:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:47:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:47:43,798 INFO L87 Difference]: Start difference. First operand 268 states and 398 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:47:56,993 WARN L207 SmtUtils]: Spent 12.89 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-13 00:48:28,425 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-13 00:48:28,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-13 00:48:28,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:48:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:48:28,627 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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 [2021-10-13 00:48:28,631 INFO L168 Benchmark]: Toolchain (without parser) took 110284.72 ms. Allocated memory was 60.8 MB in the beginning and 167.8 MB in the end (delta: 107.0 MB). Free memory was 38.5 MB in the beginning and 73.7 MB in the end (delta: -35.2 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:48:28,631 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 60.8 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:48:28,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 882.84 ms. Allocated memory is still 60.8 MB. Free memory was 38.3 MB in the beginning and 32.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:48:28,632 INFO L168 Benchmark]: Boogie Preprocessor took 157.32 ms. Allocated memory is still 60.8 MB. Free memory was 32.6 MB in the beginning and 29.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:48:28,633 INFO L168 Benchmark]: RCFGBuilder took 1049.71 ms. Allocated memory was 60.8 MB in the beginning and 98.6 MB in the end (delta: 37.7 MB). Free memory was 29.0 MB in the beginning and 53.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:48:28,634 INFO L168 Benchmark]: TraceAbstraction took 108187.68 ms. Allocated memory was 98.6 MB in the beginning and 167.8 MB in the end (delta: 69.2 MB). Free memory was 53.3 MB in the beginning and 73.7 MB in the end (delta: -20.4 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:48:28,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 60.8 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 882.84 ms. Allocated memory is still 60.8 MB. Free memory was 38.3 MB in the beginning and 32.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 157.32 ms. Allocated memory is still 60.8 MB. Free memory was 32.6 MB in the beginning and 29.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1049.71 ms. Allocated memory was 60.8 MB in the beginning and 98.6 MB in the end (delta: 37.7 MB). Free memory was 29.0 MB in the beginning and 53.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 108187.68 ms. Allocated memory was 98.6 MB in the beginning and 167.8 MB in the end (delta: 69.2 MB). Free memory was 53.3 MB in the beginning and 73.7 MB in the end (delta: -20.4 MB). Peak memory consumption was 48.8 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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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_dbb3f091-7a03-43c1-b5b4-126089e01d87/bin/uautomizer-WNIpwEf4Nt/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...