./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/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_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 857285933727e0d6539ccc24abeb7a5fe95b45c6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:54:02,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:54:02,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:54:02,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:54:02,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:54:02,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:54:02,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:54:02,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:54:02,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:54:02,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:54:02,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:54:02,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:54:02,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:54:02,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:54:02,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:54:02,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:54:02,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:54:02,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:54:02,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:54:02,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:54:02,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:54:02,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:54:02,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:54:02,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:54:02,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:54:02,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:54:02,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:54:02,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:54:02,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:54:02,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:54:02,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:54:02,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:54:02,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:54:02,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:54:02,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:54:02,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:54:02,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:54:02,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:54:02,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:54:02,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:54:02,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:54:02,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-13 00:54:02,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:54:02,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:54:02,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:54:02,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:54:02,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:54:02,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:54:02,567 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:54:02,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:54:02,568 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:54:02,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:54:02,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:54:02,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:54:02,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:54:02,569 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:54:02,570 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:54:02,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:54:02,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:54:02,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:54:02,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:54:02,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:54:02,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:54:02,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:54:02,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:54:02,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:54:02,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:54:02,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:54:02,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:54:02,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:54:02,574 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_4de3e41a-fe1e-432e-9b13-bde33d709e72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 857285933727e0d6539ccc24abeb7a5fe95b45c6 [2021-10-13 00:54:02,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:54:02,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:54:02,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:54:02,867 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:54:02,868 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:54:02,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-properties/list-2.i [2021-10-13 00:54:02,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/data/17c42fa7b/f058ab4278254af8b55b81ac84fdb6ad/FLAG1aee6fb2f [2021-10-13 00:54:03,556 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:54:03,556 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/sv-benchmarks/c/list-properties/list-2.i [2021-10-13 00:54:03,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/data/17c42fa7b/f058ab4278254af8b55b81ac84fdb6ad/FLAG1aee6fb2f [2021-10-13 00:54:03,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/data/17c42fa7b/f058ab4278254af8b55b81ac84fdb6ad [2021-10-13 00:54:03,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:54:03,892 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:54:03,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:54:03,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:54:03,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:54:03,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:03" (1/1) ... [2021-10-13 00:54:03,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374e640d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:03, skipping insertion in model container [2021-10-13 00:54:03,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:54:03" (1/1) ... [2021-10-13 00:54:03,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:54:03,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:54:04,277 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2021-10-13 00:54:04,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:54:04,289 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:54:04,366 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2021-10-13 00:54:04,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:54:04,412 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:54:04,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04 WrapperNode [2021-10-13 00:54:04,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:54:04,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:54:04,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:54:04,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:54:04,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:54:04,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:54:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:54:04,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:54:04,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (1/1) ... [2021-10-13 00:54:04,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:54:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:04,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:54:04,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:54:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:54:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:54:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:54:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:54:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:54:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:54:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:54:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:54:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 00:54:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:54:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:54:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:54:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:54:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:54:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:54:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:54:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:54:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:54:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:54:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:54:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:54:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:54:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:54:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:54:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:54:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:54:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:54:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:54:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:54:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:54:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:54:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:54:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:54:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:54:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:54:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:54:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:54:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:54:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:54:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:54:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:54:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:54:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:54:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:54:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:54:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:54:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:54:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:54:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:54:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:54:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:54:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:54:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:54:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:54:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:54:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:54:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:54:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:54:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:54:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:54:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:54:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:54:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:54:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:54:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:54:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:54:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:54:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:54:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:54:04,923 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 00:54:05,139 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:54:05,139 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:54:05,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:05 BoogieIcfgContainer [2021-10-13 00:54:05,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:54:05,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:54:05,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:54:05,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:54:05,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:54:03" (1/3) ... [2021-10-13 00:54:05,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d82aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:05, skipping insertion in model container [2021-10-13 00:54:05,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:54:04" (2/3) ... [2021-10-13 00:54:05,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d82aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:54:05, skipping insertion in model container [2021-10-13 00:54:05,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:05" (3/3) ... [2021-10-13 00:54:05,150 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2021-10-13 00:54:05,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:54:05,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-13 00:54:05,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:54:05,208 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 00:54:05,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-10-13 00:54:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:54:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:54:05,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:05,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:05,233 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 85898829, now seen corresponding path program 1 times [2021-10-13 00:54:05,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:05,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924944744] [2021-10-13 00:54:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:05,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:05,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:05,470 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 00:54:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:05,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924944744] [2021-10-13 00:54:05,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924944744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:05,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:05,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:54:05,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436063686] [2021-10-13 00:54:05,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:54:05,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:54:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:54:05,496 INFO L87 Difference]: Start difference. First operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:05,706 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-10-13 00:54:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:54:05,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 00:54:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:05,714 INFO L225 Difference]: With dead ends: 80 [2021-10-13 00:54:05,715 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 00:54:05,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:54:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 00:54:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-13 00:54:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-10-13 00:54:05,753 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 11 [2021-10-13 00:54:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-10-13 00:54:05,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-10-13 00:54:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:54:05,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:05,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:05,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:54:05,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:05,756 INFO L82 PathProgramCache]: Analyzing trace with hash 85898830, now seen corresponding path program 1 times [2021-10-13 00:54:05,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:05,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660504486] [2021-10-13 00:54:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:05,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:05,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:05,890 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 00:54:05,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:05,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660504486] [2021-10-13 00:54:05,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660504486] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:05,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:05,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:54:05,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748607012] [2021-10-13 00:54:05,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:54:05,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:54:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:54:05,894 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:06,103 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-10-13 00:54:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:54:06,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 00:54:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:06,110 INFO L225 Difference]: With dead ends: 92 [2021-10-13 00:54:06,110 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 00:54:06,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:54:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 00:54:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-10-13 00:54:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-10-13 00:54:06,135 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2021-10-13 00:54:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:06,135 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-10-13 00:54:06,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-10-13 00:54:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:54:06,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:06,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:54:06,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1250386406, now seen corresponding path program 1 times [2021-10-13 00:54:06,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:06,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790205979] [2021-10-13 00:54:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:06,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:06,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:06,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790205979] [2021-10-13 00:54:06,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790205979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:06,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:06,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:54:06,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585376478] [2021-10-13 00:54:06,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:06,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:06,278 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:06,497 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-10-13 00:54:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:54:06,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:54:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:06,499 INFO L225 Difference]: With dead ends: 120 [2021-10-13 00:54:06,499 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 00:54:06,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:54:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 00:54:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-10-13 00:54:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-10-13 00:54:06,507 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 19 [2021-10-13 00:54:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:06,508 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-10-13 00:54:06,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-10-13 00:54:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:54:06,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:06,510 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:06,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:54:06,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash 13452608, now seen corresponding path program 1 times [2021-10-13 00:54:06,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:06,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286156040] [2021-10-13 00:54:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:06,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:06,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:06,603 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 00:54:06,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:06,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286156040] [2021-10-13 00:54:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286156040] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:06,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:06,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:54:06,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446866521] [2021-10-13 00:54:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:06,606 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:06,903 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-13 00:54:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:54:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:54:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:06,905 INFO L225 Difference]: With dead ends: 109 [2021-10-13 00:54:06,905 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 00:54:06,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:54:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 00:54:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-10-13 00:54:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-10-13 00:54:06,913 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-10-13 00:54:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:06,913 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-10-13 00:54:06,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-10-13 00:54:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:54:06,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:06,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:06,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:54:06,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash 13452609, now seen corresponding path program 1 times [2021-10-13 00:54:06,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:06,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237342401] [2021-10-13 00:54:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:06,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,034 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 00:54:07,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237342401] [2021-10-13 00:54:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237342401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:07,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:07,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:54:07,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14847507] [2021-10-13 00:54:07,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:07,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:07,037 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:07,377 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-10-13 00:54:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:54:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:54:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:07,379 INFO L225 Difference]: With dead ends: 110 [2021-10-13 00:54:07,379 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 00:54:07,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:54:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 00:54:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-10-13 00:54:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-10-13 00:54:07,385 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2021-10-13 00:54:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:07,386 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-10-13 00:54:07,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-10-13 00:54:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:54:07,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:07,387 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] [2021-10-13 00:54:07,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:54:07,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 921876220, now seen corresponding path program 1 times [2021-10-13 00:54:07,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:07,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278208898] [2021-10-13 00:54:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:07,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,469 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 00:54:07,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:07,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278208898] [2021-10-13 00:54:07,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278208898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:07,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:07,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:54:07,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129370651] [2021-10-13 00:54:07,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:07,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:07,472 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:07,647 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-10-13 00:54:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:54:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:54:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:07,649 INFO L225 Difference]: With dead ends: 122 [2021-10-13 00:54:07,649 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 00:54:07,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:54:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 00:54:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-10-13 00:54:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-10-13 00:54:07,654 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2021-10-13 00:54:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:07,655 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-10-13 00:54:07,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-10-13 00:54:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:54:07,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:07,656 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] [2021-10-13 00:54:07,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:54:07,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash 921928775, now seen corresponding path program 1 times [2021-10-13 00:54:07,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:07,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489293801] [2021-10-13 00:54:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:07,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:07,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:07,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489293801] [2021-10-13 00:54:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489293801] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:07,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:07,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:54:07,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413648505] [2021-10-13 00:54:07,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:07,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:07,741 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:07,909 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-10-13 00:54:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:54:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:54:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:07,910 INFO L225 Difference]: With dead ends: 105 [2021-10-13 00:54:07,911 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 00:54:07,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:54:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 00:54:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-10-13 00:54:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-10-13 00:54:07,915 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-10-13 00:54:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:07,915 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-10-13 00:54:07,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-10-13 00:54:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:54:07,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:07,917 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:07,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:54:07,917 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash 626114546, now seen corresponding path program 1 times [2021-10-13 00:54:07,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:07,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471627286] [2021-10-13 00:54:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:07,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:07,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:07,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471627286] [2021-10-13 00:54:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471627286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:07,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:07,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:54:07,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325284283] [2021-10-13 00:54:07,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:07,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:07,988 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:08,211 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-10-13 00:54:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:54:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:54:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:08,213 INFO L225 Difference]: With dead ends: 88 [2021-10-13 00:54:08,213 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 00:54:08,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:54:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 00:54:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-10-13 00:54:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.34375) internal successors, (86), 76 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-10-13 00:54:08,217 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 21 [2021-10-13 00:54:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-10-13 00:54:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-10-13 00:54:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:54:08,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:08,219 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:08,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:54:08,219 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:08,219 INFO L82 PathProgramCache]: Analyzing trace with hash 626114547, now seen corresponding path program 1 times [2021-10-13 00:54:08,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:08,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921481307] [2021-10-13 00:54:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:08,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:08,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:08,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:08,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921481307] [2021-10-13 00:54:08,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921481307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:08,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:08,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:54:08,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630323631] [2021-10-13 00:54:08,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:54:08,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:54:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:54:08,313 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:08,566 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-10-13 00:54:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:54:08,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:54:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:08,567 INFO L225 Difference]: With dead ends: 85 [2021-10-13 00:54:08,567 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 00:54:08,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:54:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 00:54:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-10-13 00:54:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-13 00:54:08,571 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-10-13 00:54:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:08,571 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-13 00:54:08,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:54:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-13 00:54:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:54:08,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:08,572 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] [2021-10-13 00:54:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:54:08,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-10-13 00:54:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1486603147, now seen corresponding path program 1 times [2021-10-13 00:54:08,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:08,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739718529] [2021-10-13 00:54:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:08,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:08,602 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:54:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:54:08,652 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:54:08,652 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:54:08,654 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:54:08,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:54:08,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:54:08,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:54:08,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:54:08,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 00:54:08,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 00:54:08,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 00:54:08,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 00:54:08,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 00:54:08,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 00:54:08,665 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 00:54:08,665 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 00:54:08,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 00:54:08,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-13 00:54:08,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:54:08,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:54:08,674 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:54:08,696 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 00:54:08,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:54:08 BoogieIcfgContainer [2021-10-13 00:54:08,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:54:08,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:54:08,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:54:08,718 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:54:08,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:54:05" (3/4) ... [2021-10-13 00:54:08,720 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:54:08,724 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 00:54:08,778 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:54:08,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:54:08,780 INFO L168 Benchmark]: Toolchain (without parser) took 4886.90 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 63.8 MB in the beginning and 76.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,780 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:54:08,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.49 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 63.5 MB in the beginning and 113.3 MB in the end (delta: -49.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,782 INFO L168 Benchmark]: Boogie Preprocessor took 58.90 ms. Allocated memory is still 144.7 MB. Free memory was 113.3 MB in the beginning and 110.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,782 INFO L168 Benchmark]: RCFGBuilder took 667.62 ms. Allocated memory is still 144.7 MB. Free memory was 110.6 MB in the beginning and 88.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,782 INFO L168 Benchmark]: TraceAbstraction took 3574.05 ms. Allocated memory is still 144.7 MB. Free memory was 87.5 MB in the beginning and 79.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,783 INFO L168 Benchmark]: Witness Printer took 60.31 ms. Allocated memory is still 144.7 MB. Free memory was 79.0 MB in the beginning and 76.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:08,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 518.49 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 63.5 MB in the beginning and 113.3 MB in the end (delta: -49.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.90 ms. Allocated memory is still 144.7 MB. Free memory was 113.3 MB in the beginning and 110.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 667.62 ms. Allocated memory is still 144.7 MB. Free memory was 110.6 MB in the beginning and 88.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3574.05 ms. Allocated memory is still 144.7 MB. Free memory was 87.5 MB in the beginning and 79.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Witness Printer took 60.31 ms. Allocated memory is still 144.7 MB. Free memory was 79.0 MB in the beginning and 76.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={-1:0}, p={-1:0}] [L551] p = a VAL [a={-1:0}, p={-1:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={-1:0}, p={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 3471.2ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 20.2ms, AutomataDifference: 2151.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 395 SDtfs, 696 SDslu, 939 SDs, 0 SdLazy, 1788 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1337.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 610.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 194 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.7ms SsaConstructionTime, 148.5ms SatisfiabilityAnalysisTime, 748.3ms InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 802 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 00:54:08,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de3e41a-fe1e-432e-9b13-bde33d709e72/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...