./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/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_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3 --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-5709675 [2021-10-15 19:10:54,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:10:54,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:10:54,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:10:54,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:10:54,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:10:54,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:10:54,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:10:54,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:10:54,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:10:54,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:10:54,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:10:54,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:10:54,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:10:54,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:10:54,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:10:54,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:10:54,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:10:54,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:10:54,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:10:54,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:10:54,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:10:54,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:10:54,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:10:54,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:10:54,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:10:54,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:10:54,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:10:54,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:10:54,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:10:54,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:10:54,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:10:54,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:10:54,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:10:54,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:10:54,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:10:54,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:10:54,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:10:54,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:10:54,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:10:54,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:10:54,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:10:54,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:10:54,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:10:54,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:10:54,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:10:54,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:10:54,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:10:54,600 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:10:54,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:10:54,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:10:54,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:10:54,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:10:54,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:10:54,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:10:54,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:10:54,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:10:54,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:10:54,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:10:54,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:10:54,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:10:54,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:10:54,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:10:54,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:10:54,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:10:54,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:10:54,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:10:54,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:10:54,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:10:54,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:10:54,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:10:54,609 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_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-10-15 19:10:54,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:10:55,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:10:55,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:10:55,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:10:55,008 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:10:55,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-15 19:10:55,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/data/4d725c07a/88218d34848245a2b2ba751ef9a8ae45/FLAGf954b452b [2021-10-15 19:10:55,678 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:10:55,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-15 19:10:55,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/data/4d725c07a/88218d34848245a2b2ba751ef9a8ae45/FLAGf954b452b [2021-10-15 19:10:55,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/data/4d725c07a/88218d34848245a2b2ba751ef9a8ae45 [2021-10-15 19:10:55,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:10:55,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:10:55,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:10:55,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:10:55,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:10:55,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:10:55" (1/1) ... [2021-10-15 19:10:55,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d758a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:55, skipping insertion in model container [2021-10-15 19:10:55,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:10:55" (1/1) ... [2021-10-15 19:10:55,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:10:55,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:10:56,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:10:56,342 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:10:56,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:10:56,411 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:10:56,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56 WrapperNode [2021-10-15 19:10:56,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:10:56,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:10:56,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:10:56,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:10:56,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:10:56,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:10:56,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:10:56,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:10:56,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:10:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:10:56,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:10:56,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:10:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:10:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:10:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:10:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:10:56,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:10:56,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:10:56,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:10:56,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:10:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:10:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:10:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:10:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:10:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:10:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:10:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:10:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:10:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:10:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:10:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:10:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:10:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:10:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:10:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:10:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:10:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:10:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:10:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:10:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:10:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:10:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:10:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:10:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:10:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:10:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:10:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:10:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:10:56,593 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:10:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:10:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:10:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:10:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:10:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:10:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:10:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:10:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:10:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:10:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:10:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:10:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:10:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:10:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:10:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:10:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:10:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:10:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:10:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:10:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:10:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:10:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:10:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:10:57,340 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:10:57,344 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-15 19:10:57,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57 BoogieIcfgContainer [2021-10-15 19:10:57,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:10:57,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:10:57,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:10:57,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:10:57,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:10:55" (1/3) ... [2021-10-15 19:10:57,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7bdf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:10:57, skipping insertion in model container [2021-10-15 19:10:57,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (2/3) ... [2021-10-15 19:10:57,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7bdf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:10:57, skipping insertion in model container [2021-10-15 19:10:57,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57" (3/3) ... [2021-10-15 19:10:57,364 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-15 19:10:57,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:10:57,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-15 19:10:57,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:10:57,445 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 [2021-10-15 19:10:57,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-15 19:10:57,469 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) [2021-10-15 19:10:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 19:10:57,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:57,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:57,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-10-15 19:10:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:57,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137978380] [2021-10-15 19:10:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:57,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:57,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137978380] [2021-10-15 19:10:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137978380] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:57,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:57,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:10:57,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263804345] [2021-10-15 19:10:57,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:10:57,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:10:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:10:57,945 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) [2021-10-15 19:10:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:10:58,424 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-10-15 19:10:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:10:58,426 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 [2021-10-15 19:10:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:10:58,437 INFO L225 Difference]: With dead ends: 125 [2021-10-15 19:10:58,437 INFO L226 Difference]: Without dead ends: 121 [2021-10-15 19:10:58,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:10:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-15 19:10:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-10-15 19:10:58,485 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) [2021-10-15 19:10:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-15 19:10:58,489 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-10-15 19:10:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:10:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-15 19:10:58,491 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) [2021-10-15 19:10:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-15 19:10:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 19:10:58,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:58,493 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:10:58,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-10-15 19:10:58,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:58,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831836882] [2021-10-15 19:10:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:58,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:58,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:58,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:58,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831836882] [2021-10-15 19:10:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831836882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:58,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:58,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:10:58,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432608007] [2021-10-15 19:10:58,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:10:58,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:10:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:10:58,600 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) [2021-10-15 19:10:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:10:58,722 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-15 19:10:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:10:58,722 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 [2021-10-15 19:10:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:10:58,725 INFO L225 Difference]: With dead ends: 60 [2021-10-15 19:10:58,726 INFO L226 Difference]: Without dead ends: 60 [2021-10-15 19:10:58,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:10:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-15 19:10:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-15 19:10:58,735 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) [2021-10-15 19:10:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-15 19:10:58,745 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-10-15 19:10:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:10:58,745 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-15 19:10:58,746 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) [2021-10-15 19:10:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-15 19:10:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 19:10:58,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:58,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:58,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:10:58,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:58,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-10-15 19:10:58,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:58,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531648950] [2021-10-15 19:10:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:58,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:58,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:58,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531648950] [2021-10-15 19:10:58,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531648950] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:58,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:58,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:10:58,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629392392] [2021-10-15 19:10:58,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:10:58,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:10:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:10:58,906 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) [2021-10-15 19:10:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:10:59,037 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-15 19:10:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:10:59,038 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 [2021-10-15 19:10:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:10:59,039 INFO L225 Difference]: With dead ends: 64 [2021-10-15 19:10:59,039 INFO L226 Difference]: Without dead ends: 64 [2021-10-15 19:10:59,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:10:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-15 19:10:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-10-15 19:10:59,044 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) [2021-10-15 19:10:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-10-15 19:10:59,045 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-10-15 19:10:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:10:59,045 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-10-15 19:10:59,046 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) [2021-10-15 19:10:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-10-15 19:10:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:10:59,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:59,047 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:59,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:10:59,048 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-10-15 19:10:59,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:59,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648587735] [2021-10-15 19:10:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:10:59,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:59,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648587735] [2021-10-15 19:10:59,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648587735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:59,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:59,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:10:59,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678106941] [2021-10-15 19:10:59,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:10:59,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:10:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:10:59,126 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) [2021-10-15 19:10:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:10:59,235 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-15 19:10:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:10:59,235 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 [2021-10-15 19:10:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:10:59,236 INFO L225 Difference]: With dead ends: 60 [2021-10-15 19:10:59,237 INFO L226 Difference]: Without dead ends: 60 [2021-10-15 19:10:59,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:10:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-15 19:10:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-15 19:10:59,241 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) [2021-10-15 19:10:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-15 19:10:59,242 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-10-15 19:10:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:10:59,242 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-15 19:10:59,243 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) [2021-10-15 19:10:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-15 19:10:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:10:59,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:59,244 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:59,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:10:59,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-10-15 19:10:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:59,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780565021] [2021-10-15 19:10:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:59,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:59,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780565021] [2021-10-15 19:10:59,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780565021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:10:59,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018085643] [2021-10-15 19:10:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:10:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:10:59,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:10:59,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:10:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:10:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:10:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:59,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018085643] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:59,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:10:59,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-15 19:10:59,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947452242] [2021-10-15 19:10:59,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:10:59,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:10:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:10:59,541 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) [2021-10-15 19:10:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:10:59,575 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-15 19:10:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:10:59,576 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 [2021-10-15 19:10:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:10:59,577 INFO L225 Difference]: With dead ends: 109 [2021-10-15 19:10:59,578 INFO L226 Difference]: Without dead ends: 109 [2021-10-15 19:10:59,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:10:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-15 19:10:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-10-15 19:10:59,596 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) [2021-10-15 19:10:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-15 19:10:59,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-10-15 19:10:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:10:59,597 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-15 19:10:59,597 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) [2021-10-15 19:10:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-15 19:10:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:10:59,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:10:59,598 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:10:59,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:10:59,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:10:59,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:10:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-10-15 19:10:59,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:59,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408042823] [2021-10-15 19:10:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:10:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:59,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408042823] [2021-10-15 19:10:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408042823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:10:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440142252] [2021-10-15 19:10:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:10:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:10:59,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:10:59,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:11:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:11:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:00,174 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 [2021-10-15 19:11:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440142252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:00,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:11:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-10-15 19:11:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847225593] [2021-10-15 19:11:00,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:11:00,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:11:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:11:00,378 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) [2021-10-15 19:11:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:11:00,806 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-10-15 19:11:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:11:00,807 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 [2021-10-15 19:11:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:11:00,808 INFO L225 Difference]: With dead ends: 123 [2021-10-15 19:11:00,809 INFO L226 Difference]: Without dead ends: 123 [2021-10-15 19:11:00,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:11:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-15 19:11:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-10-15 19:11:00,814 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) [2021-10-15 19:11:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-15 19:11:00,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-10-15 19:11:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:11:00,816 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-15 19:11:00,816 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) [2021-10-15 19:11:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-15 19:11:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:11:00,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:11:00,817 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:00,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-15 19:11:01,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:11:01,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:11:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-10-15 19:11:01,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:01,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482350586] [2021-10-15 19:11:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:01,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:11:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:01,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:01,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482350586] [2021-10-15 19:11:01,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482350586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:01,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369909843] [2021-10-15 19:11:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:01,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:01,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:01,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:11:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:11:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:01,310 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 [2021-10-15 19:11:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:01,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369909843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:01,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:11:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-15 19:11:01,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341694271] [2021-10-15 19:11:01,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:11:01,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:11:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:11:01,427 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) [2021-10-15 19:11:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:11:01,659 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-15 19:11:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:11:01,660 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 [2021-10-15 19:11:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:11:01,661 INFO L225 Difference]: With dead ends: 74 [2021-10-15 19:11:01,661 INFO L226 Difference]: Without dead ends: 74 [2021-10-15 19:11:01,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:11:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-15 19:11:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-10-15 19:11:01,666 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) [2021-10-15 19:11:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-15 19:11:01,667 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-10-15 19:11:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:11:01,673 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-15 19:11:01,673 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) [2021-10-15 19:11:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-15 19:11:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 19:11:01,674 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:11:01,675 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:01,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:01,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:01,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:11:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-10-15 19:11:01,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:01,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188849049] [2021-10-15 19:11:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:01,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:11:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:11:01,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:01,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188849049] [2021-10-15 19:11:01,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188849049] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:01,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:01,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:11:01,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682976377] [2021-10-15 19:11:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:11:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:11:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:01,979 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) [2021-10-15 19:11:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:11:02,091 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-15 19:11:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:11:02,091 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 [2021-10-15 19:11:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:11:02,093 INFO L225 Difference]: With dead ends: 80 [2021-10-15 19:11:02,093 INFO L226 Difference]: Without dead ends: 80 [2021-10-15 19:11:02,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:11:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-15 19:11:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-10-15 19:11:02,104 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) [2021-10-15 19:11:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-15 19:11:02,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-10-15 19:11:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:11:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-15 19:11:02,106 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) [2021-10-15 19:11:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-15 19:11:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 19:11:02,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:11:02,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:02,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:11:02,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:11:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-10-15 19:11:02,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:02,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116823625] [2021-10-15 19:11:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:02,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:02,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:11:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:02,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:02,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116823625] [2021-10-15 19:11:02,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116823625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:02,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945879700] [2021-10-15 19:11:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:02,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:02,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:02,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:11:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:11:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945879700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:02,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:11:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-10-15 19:11:02,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394877675] [2021-10-15 19:11:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:11:02,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:11:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:11:02,510 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) [2021-10-15 19:11:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:11:02,716 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-15 19:11:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:11:02,717 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 [2021-10-15 19:11:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:11:02,718 INFO L225 Difference]: With dead ends: 81 [2021-10-15 19:11:02,718 INFO L226 Difference]: Without dead ends: 81 [2021-10-15 19:11:02,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:11:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-15 19:11:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-10-15 19:11:02,722 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) [2021-10-15 19:11:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-15 19:11:02,723 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 17 [2021-10-15 19:11:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:11:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-15 19:11:02,724 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) [2021-10-15 19:11:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-15 19:11:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-15 19:11:02,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:11:02,725 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] [2021-10-15 19:11:02,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:02,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:02,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-15 19:11:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-10-15 19:11:02,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:02,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111255402] [2021-10-15 19:11:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:02,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:11:02,952 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:11:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:11:03,008 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:11:03,011 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:11:03,012 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION [2021-10-15 19:11:03,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:11:03,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:11:03,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:11:03,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:11:03,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-15 19:11:03,019 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-15 19:11:03,019 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-15 19:11:03,019 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-15 19:11:03,019 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-15 19:11:03,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-15 19:11:03,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-15 19:11:03,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-15 19:11:03,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-15 19:11:03,020 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-15 19:11:03,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-15 19:11:03,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-15 19:11:03,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-15 19:11:03,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-15 19:11:03,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-15 19:11:03,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-15 19:11:03,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-15 19:11:03,022 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:11:03,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:11:03,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:11:03,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:11:03 BoogieIcfgContainer [2021-10-15 19:11:03,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:11:03,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:11:03,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:11:03,054 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:11:03,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57" (3/4) ... [2021-10-15 19:11:03,058 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:11:03,125 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef43ed-29eb-4237-8f9a-2bee1852248f/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:11:03,125 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:11:03,127 INFO L168 Benchmark]: Toolchain (without parser) took 7185.80 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 57.2 MB in the beginning and 74.8 MB in the end (delta: -17.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:03,127 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:03,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 470.93 ms. Allocated memory is still 90.2 MB. Free memory was 56.9 MB in the beginning and 61.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:03,129 INFO L168 Benchmark]: Boogie Preprocessor took 56.78 ms. Allocated memory is still 90.2 MB. Free memory was 61.0 MB in the beginning and 58.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:03,129 INFO L168 Benchmark]: RCFGBuilder took 877.52 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 58.6 MB in the beginning and 87.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:03,130 INFO L168 Benchmark]: TraceAbstraction took 5702.88 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 75.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:03,130 INFO L168 Benchmark]: Witness Printer took 71.52 ms. Allocated memory is still 113.2 MB. Free memory was 75.9 MB in the beginning and 74.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:03,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 470.93 ms. Allocated memory is still 90.2 MB. Free memory was 56.9 MB in the beginning and 61.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.78 ms. Allocated memory is still 90.2 MB. Free memory was 61.0 MB in the beginning and 58.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 877.52 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 58.6 MB in the beginning and 87.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5702.88 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 75.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 71.52 ms. Allocated memory is still 113.2 MB. Free memory was 75.9 MB in the beginning and 74.8 MB in the end (delta: 1.1 MB). There was no memory consumed. 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=0, i=1, length=1] [L526] COND TRUE i