./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/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_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:17:34,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:17:34,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:17:34,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:17:34,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:17:34,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:17:34,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:17:34,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:17:34,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:17:34,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:17:34,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:17:34,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:17:34,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:17:34,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:17:34,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:17:34,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:17:34,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:17:34,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:17:34,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:17:34,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:17:34,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:17:34,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:17:34,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:17:34,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:17:34,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:17:34,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:17:34,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:17:34,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:17:34,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:17:34,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:17:34,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:17:34,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:17:34,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:17:34,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:17:34,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:17:34,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:17:34,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:17:34,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:17:34,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:17:34,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:17:34,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:17:34,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:17:34,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:17:34,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:17:34,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:17:34,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:17:34,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:17:34,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:17:34,715 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:17:34,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:17:34,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:17:34,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:17:34,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:17:34,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:17:34,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:17:34,718 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:17:34,719 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:17:34,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:17:34,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:17:34,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:17:34,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:17:34,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:17:34,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:17:34,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:17:34,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:17:34,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:17:34,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:17:34,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:17:34,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:17:34,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:17:34,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:17:34,725 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_c49b2bbf-13af-43bb-9ac3-47c32b73197d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-10-13 00:17:34,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:17:35,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:17:35,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:17:35,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:17:35,029 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:17:35,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 00:17:35,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/data/c9cb82c02/57bd604720ae45ceb4165fd640e56bc9/FLAG67f0542f2 [2021-10-13 00:17:35,669 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:17:35,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-13 00:17:35,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/data/c9cb82c02/57bd604720ae45ceb4165fd640e56bc9/FLAG67f0542f2 [2021-10-13 00:17:35,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/data/c9cb82c02/57bd604720ae45ceb4165fd640e56bc9 [2021-10-13 00:17:35,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:17:35,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:17:35,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:17:35,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:17:35,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:17:35,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:17:35" (1/1) ... [2021-10-13 00:17:35,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575fa3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:35, skipping insertion in model container [2021-10-13 00:17:35,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:17:35" (1/1) ... [2021-10-13 00:17:35,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:17:36,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:17:36,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:17:36,422 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:17:36,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:17:36,495 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:17:36,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36 WrapperNode [2021-10-13 00:17:36,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:17:36,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:17:36,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:17:36,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:17:36,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:17:36,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:17:36,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:17:36,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:17:36,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (1/1) ... [2021-10-13 00:17:36,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:17:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:36,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:17:36,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:17:36,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:17:36,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:17:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:17:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:17:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:17:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:17:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:17:36,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:17:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:17:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:17:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:17:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:17:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:17:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:17:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:17:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:17:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:17:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:17:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:17:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:17:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:17:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:17:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:17:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:17:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:17:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:17:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:17:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:17:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:17:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:17:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:17:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:17:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:17:36,656 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:17:36,656 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:17:36,656 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:17:36,656 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:17:36,656 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:17:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:17:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:17:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:17:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:17:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:17:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:17:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:17:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:17:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:17:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:17:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:17:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:17:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:17:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:17:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:17:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:17:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:17:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:17:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:17:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:17:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:17:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:17:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:17:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:17:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:17:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:17:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:17:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:17:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:17:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:17:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:17:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:17:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:17:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:17:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:17:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:17:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:17:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:17:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:17:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:17:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:17:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:17:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:17:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:17:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:17:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:17:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:17:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-13 00:17:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:17:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:17:37,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:17:37,196 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-13 00:17:37,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:17:37 BoogieIcfgContainer [2021-10-13 00:17:37,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:17:37,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:17:37,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:17:37,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:17:37,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:17:35" (1/3) ... [2021-10-13 00:17:37,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a9e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:17:37, skipping insertion in model container [2021-10-13 00:17:37,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:17:36" (2/3) ... [2021-10-13 00:17:37,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a9e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:17:37, skipping insertion in model container [2021-10-13 00:17:37,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:17:37" (3/3) ... [2021-10-13 00:17:37,220 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-13 00:17:37,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:17:37,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-13 00:17:37,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:17:37,318 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 00:17:37,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-13 00:17:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:17:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:17:37,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:37,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:37,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-10-13 00:17:37,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:37,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347275660] [2021-10-13 00:17:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:37,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:37,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:37,742 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 00:17:37,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347275660] [2021-10-13 00:17:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347275660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:37,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:17:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:17:37,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616617590] [2021-10-13 00:17:37,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:17:37,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:17:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:17:37,787 INFO L87 Difference]: Start difference. First operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 00:17:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:38,206 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-10-13 00:17:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:17:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 00:17:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:38,218 INFO L225 Difference]: With dead ends: 125 [2021-10-13 00:17:38,219 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 00:17:38,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:17:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 00:17:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-10-13 00:17:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 61 states have internal predecessors, (69), 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 00:17:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-13 00:17:38,286 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-10-13 00:17:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-13 00:17:38,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 00:17:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-13 00:17:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:17:38,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:38,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:38,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:17:38,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-10-13 00:17:38,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:38,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684542701] [2021-10-13 00:17:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:38,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,414 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 00:17:38,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:38,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684542701] [2021-10-13 00:17:38,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684542701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:38,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:17:38,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:17:38,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680320809] [2021-10-13 00:17:38,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:17:38,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:17:38,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:17:38,418 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 00:17:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:38,542 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-13 00:17:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:17:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 00:17:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:38,544 INFO L225 Difference]: With dead ends: 60 [2021-10-13 00:17:38,544 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 00:17:38,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:17:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 00:17:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 00:17:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 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 00:17:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-13 00:17:38,552 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-10-13 00:17:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-13 00:17:38,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 00:17:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-13 00:17:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:17:38,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:38,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:38,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:17:38,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-10-13 00:17:38,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:38,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339778360] [2021-10-13 00:17:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:38,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,648 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 00:17:38,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:38,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339778360] [2021-10-13 00:17:38,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339778360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:38,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:17:38,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:17:38,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080824379] [2021-10-13 00:17:38,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:17:38,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:17:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:17:38,652 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 00:17:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:38,796 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-13 00:17:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:17:38,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 00:17:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:38,804 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:17:38,804 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 00:17:38,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:17:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 00:17:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-10-13 00:17:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.631578947368421) internal successors, (62), 55 states have internal predecessors, (62), 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 00:17:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-10-13 00:17:38,811 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-10-13 00:17:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-10-13 00:17:38,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 00:17:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-10-13 00:17:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:17:38,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:38,813 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:38,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:17:38,814 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-10-13 00:17:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:38,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657747145] [2021-10-13 00:17:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:38,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:17:38,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:38,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657747145] [2021-10-13 00:17:38,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657747145] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:38,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:17:38,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:17:38,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764410382] [2021-10-13 00:17:38,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:17:38,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:17:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:17:38,922 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 00:17:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:39,018 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-13 00:17:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:17:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2021-10-13 00:17:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:39,020 INFO L225 Difference]: With dead ends: 60 [2021-10-13 00:17:39,020 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 00:17:39,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:17:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 00:17:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 00:17:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 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 00:17:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-13 00:17:39,036 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-10-13 00:17:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:39,037 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-13 00:17:39,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 00:17:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-13 00:17:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:17:39,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:39,038 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:39,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:17:39,040 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-10-13 00:17:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:39,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919239774] [2021-10-13 00:17:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:39,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919239774] [2021-10-13 00:17:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919239774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665553119] [2021-10-13 00:17:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:39,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:39,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:39,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:17:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:17:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:39,488 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 00:17:39,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665553119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:39,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:17:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-13 00:17:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70671771] [2021-10-13 00:17:39,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:17:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:17:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:17:39,491 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 00:17:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:39,534 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-13 00:17:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:17:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 15 [2021-10-13 00:17:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:39,536 INFO L225 Difference]: With dead ends: 109 [2021-10-13 00:17:39,536 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 00:17:39,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:17:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 00:17:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-10-13 00:17:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 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 00:17:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-13 00:17:39,542 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-10-13 00:17:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:39,542 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-13 00:17:39,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 00:17:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-13 00:17:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:17:39,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:39,544 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:39,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:39,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:39,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-10-13 00:17:39,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:39,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234729339] [2021-10-13 00:17:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:39,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234729339] [2021-10-13 00:17:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234729339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:39,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387082765] [2021-10-13 00:17:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:39,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:39,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:39,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:39,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:17:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:17:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:40,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-10-13 00:17:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:40,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387082765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:40,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:40,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-10-13 00:17:40,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446001516] [2021-10-13 00:17:40,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:17:40,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:17:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:17:40,233 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:40,557 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-10-13 00:17:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:17:40,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:17:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:40,558 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:17:40,558 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 00:17:40,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:17:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 00:17:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-10-13 00:17:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.48) internal successors, (74), 67 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 00:17:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-13 00:17:40,564 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-10-13 00:17:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-13 00:17:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-13 00:17:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:17:40,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:40,565 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:40,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:40,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 00:17:40,766 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:40,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-10-13 00:17:40,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:40,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713546373] [2021-10-13 00:17:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:40,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:40,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:40,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713546373] [2021-10-13 00:17:40,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713546373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:40,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781524335] [2021-10-13 00:17:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:40,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:40,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:17:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:17:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:40,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 00:17:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:41,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781524335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:41,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:41,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-13 00:17:41,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71358201] [2021-10-13 00:17:41,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:17:41,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:17:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:17:41,108 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:41,390 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-13 00:17:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:17:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:17:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:41,391 INFO L225 Difference]: With dead ends: 74 [2021-10-13 00:17:41,391 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 00:17:41,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:17:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 00:17:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-10-13 00:17:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 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 00:17:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-13 00:17:41,396 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-10-13 00:17:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:41,396 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-13 00:17:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-13 00:17:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:17:41,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:41,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:41,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:41,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 00:17:41,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:41,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-10-13 00:17:41,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:41,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902875090] [2021-10-13 00:17:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:41,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:17:41,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:41,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902875090] [2021-10-13 00:17:41,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902875090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:17:41,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:17:41,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:17:41,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950388158] [2021-10-13 00:17:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:17:41,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:17:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:17:41,698 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 00:17:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:41,781 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-13 00:17:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:17:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-10-13 00:17:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:41,782 INFO L225 Difference]: With dead ends: 80 [2021-10-13 00:17:41,782 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 00:17:41,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:17:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 00:17:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-10-13 00:17:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.46) internal successors, (73), 66 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 00:17:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-13 00:17:41,787 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-10-13 00:17:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-13 00:17:41,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 00:17:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-13 00:17:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:17:41,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:41,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:41,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:17:41,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:41,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:41,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-10-13 00:17:41,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:41,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900765250] [2021-10-13 00:17:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:41,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:41,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:17:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:41,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:41,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900765250] [2021-10-13 00:17:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900765250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:41,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996442703] [2021-10-13 00:17:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:41,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:41,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:41,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:17:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:17:41,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996442703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:42,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:42,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-10-13 00:17:42,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513542845] [2021-10-13 00:17:42,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:17:42,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:17:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:17:42,140 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:42,336 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-13 00:17:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:17:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 00:17:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:42,337 INFO L225 Difference]: With dead ends: 81 [2021-10-13 00:17:42,337 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 00:17:42,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:17:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 00:17:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-10-13 00:17:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 71 states have internal predecessors, (79), 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 00:17:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-13 00:17:42,344 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 17 [2021-10-13 00:17:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:42,345 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-13 00:17:42,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:17:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-13 00:17:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:17:42,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:42,347 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 00:17:42,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:42,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:42,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 00:17:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-10-13 00:17:42,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:42,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736713758] [2021-10-13 00:17:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:42,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:17:42,561 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:17:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:17:42,593 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:17:42,593 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:17:42,594 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION [2021-10-13 00:17:42,596 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:17:42,596 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:17:42,596 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:17:42,596 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:17:42,597 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:17:42,597 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:17:42,597 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:17:42,597 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:17:42,597 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 00:17:42,598 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 00:17:42,599 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 00:17:42,600 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:17:42,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:17:42,606 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:17:42,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:17:42 BoogieIcfgContainer [2021-10-13 00:17:42,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:17:42,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:17:42,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:17:42,640 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:17:42,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:17:37" (3/4) ... [2021-10-13 00:17:42,642 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:17:42,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49b2bbf-13af-43bb-9ac3-47c32b73197d/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:17:42,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:17:42,708 INFO L168 Benchmark]: Toolchain (without parser) took 6750.06 ms. Allocated memory was 117.4 MB in the beginning and 157.3 MB in the end (delta: 39.8 MB). Free memory was 76.9 MB in the beginning and 73.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 44.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,708 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 117.4 MB. Free memory is still 94.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:17:42,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 527.08 ms. Allocated memory is still 117.4 MB. Free memory was 76.6 MB in the beginning and 85.5 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,709 INFO L168 Benchmark]: Boogie Preprocessor took 55.49 ms. Allocated memory is still 117.4 MB. Free memory was 85.5 MB in the beginning and 82.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,710 INFO L168 Benchmark]: RCFGBuilder took 645.95 ms. Allocated memory is still 117.4 MB. Free memory was 82.9 MB in the beginning and 62.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,710 INFO L168 Benchmark]: TraceAbstraction took 5438.22 ms. Allocated memory was 117.4 MB in the beginning and 157.3 MB in the end (delta: 39.8 MB). Free memory was 61.5 MB in the beginning and 75.6 MB in the end (delta: -14.0 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,711 INFO L168 Benchmark]: Witness Printer took 66.96 ms. Allocated memory is still 157.3 MB. Free memory was 75.6 MB in the beginning and 73.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:17:42,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 117.4 MB. Free memory is still 94.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 527.08 ms. Allocated memory is still 117.4 MB. Free memory was 76.6 MB in the beginning and 85.5 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.49 ms. Allocated memory is still 117.4 MB. Free memory was 85.5 MB in the beginning and 82.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 645.95 ms. Allocated memory is still 117.4 MB. Free memory was 82.9 MB in the beginning and 62.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5438.22 ms. Allocated memory was 117.4 MB in the beginning and 157.3 MB in the end (delta: 39.8 MB). Free memory was 61.5 MB in the beginning and 75.6 MB in the end (delta: -14.0 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * Witness Printer took 66.96 ms. Allocated memory is still 157.3 MB. Free memory was 75.6 MB in the beginning and 73.5 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.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: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i