./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/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_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y --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 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:22:57,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:22:57,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:22:57,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:22:57,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:22:57,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:22:57,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:22:57,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:22:57,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:22:57,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:22:57,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:22:57,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:22:57,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:22:57,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:22:58,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:22:58,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:22:58,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:22:58,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:22:58,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:22:58,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:22:58,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:22:58,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:22:58,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:22:58,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:22:58,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:22:58,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:22:58,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:22:58,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:22:58,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:22:58,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:22:58,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:22:58,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:22:58,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:22:58,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:22:58,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:22:58,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:22:58,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:22:58,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:22:58,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:22:58,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:22:58,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:22:58,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:22:58,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:22:58,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:22:58,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:22:58,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:22:58,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:22:58,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:22:58,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:22:58,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:22:58,140 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:22:58,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:22:58,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:22:58,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:22:58,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:22:58,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:22:58,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:22:58,144 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:22:58,144 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:22:58,144 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:22:58,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:22:58,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:22:58,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:22:58,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:22:58,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:22:58,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:22:58,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:22:58,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:22:58,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:22:58,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:22:58,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:22:58,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:22:58,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:22:58,150 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_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 [2021-11-13 18:22:58,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:22:58,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:22:58,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:22:58,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:22:58,532 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:22:58,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-11-13 18:22:58,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/data/15fe34b1c/4d5adb637f494eefba1062eb8e966c65/FLAG3ecd88523 [2021-11-13 18:22:59,322 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:22:59,323 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-11-13 18:22:59,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/data/15fe34b1c/4d5adb637f494eefba1062eb8e966c65/FLAG3ecd88523 [2021-11-13 18:22:59,552 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/data/15fe34b1c/4d5adb637f494eefba1062eb8e966c65 [2021-11-13 18:22:59,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:22:59,561 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:22:59,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:22:59,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:22:59,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:22:59,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:22:59,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce3e7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59, skipping insertion in model container [2021-11-13 18:22:59,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:22:59,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:22:59,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:23:00,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:23:00,122 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:23:00,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:23:00,203 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:23:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00 WrapperNode [2021-11-13 18:23:00,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:23:00,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:23:00,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:23:00,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:23:00,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:23:00,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:23:00,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:23:00,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:23:00,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (1/1) ... [2021-11-13 18:23:00,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:23:00,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:00,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:23:00,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:23:00,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:23:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:23:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:23:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:23:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:23:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:23:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:23:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:23:00,415 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:23:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:23:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:23:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:23:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:23:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:23:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:23:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:23:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:23:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:23:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:23:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:23:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:23:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:23:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:23:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:23:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:23:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:23:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:23:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:23:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:23:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:23:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:23:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:23:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:23:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:23:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:23:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:23:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:23:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:23:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:23:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:23:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:23:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:23:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:23:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:23:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:23:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:23:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:23:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:23:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:23:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:23:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:23:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:23:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:23:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:23:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:23:01,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:23:01,168 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:23:01,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:01 BoogieIcfgContainer [2021-11-13 18:23:01,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:23:01,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:23:01,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:23:01,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:23:01,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:22:59" (1/3) ... [2021-11-13 18:23:01,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32adce33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:01, skipping insertion in model container [2021-11-13 18:23:01,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:00" (2/3) ... [2021-11-13 18:23:01,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32adce33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:01, skipping insertion in model container [2021-11-13 18:23:01,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:01" (3/3) ... [2021-11-13 18:23:01,183 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-11-13 18:23:01,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:23:01,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-11-13 18:23:01,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:23:01,260 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:23:01,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-11-13 18:23:01,280 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) [2021-11-13 18:23:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:23:01,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:01,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:01,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:01,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-11-13 18:23:01,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:01,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133137122] [2021-11-13 18:23:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:01,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:01,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:01,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:01,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133137122] [2021-11-13 18:23:01,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133137122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:01,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:01,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:01,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233719696] [2021-11-13 18:23:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:01,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:23:01,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:23:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:23:01,807 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) [2021-11-13 18:23:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:02,350 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-11-13 18:23:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:23:02,353 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 [2021-11-13 18:23:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:02,365 INFO L225 Difference]: With dead ends: 125 [2021-11-13 18:23:02,366 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:23:02,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:23:02,373 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 125 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.12ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 409.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:02,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 287 Invalid, 302 Unknown, 0 Unchecked, 24.12ms Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 409.00ms Time] [2021-11-13 18:23:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:23:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-11-13 18:23:02,423 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) [2021-11-13 18:23:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-13 18:23:02,427 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-11-13 18:23:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-13 18:23:02,428 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) [2021-11-13 18:23:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-13 18:23:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:23:02,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:02,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:02,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:23:02,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-11-13 18:23:02,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:02,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325416109] [2021-11-13 18:23:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:02,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:02,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:02,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325416109] [2021-11-13 18:23:02,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325416109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:02,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:02,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:02,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460766303] [2021-11-13 18:23:02,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:02,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:23:02,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:23:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:02,520 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) [2021-11-13 18:23:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:02,663 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-13 18:23:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:23:02,664 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 [2021-11-13 18:23:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:02,670 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:23:02,670 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:23:02,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:02,679 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:02,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 122.67ms Time] [2021-11-13 18:23:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:23:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-13 18:23:02,696 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) [2021-11-13 18:23:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-13 18:23:02,702 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-11-13 18:23:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:02,703 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-13 18:23:02,703 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) [2021-11-13 18:23:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-13 18:23:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:23:02,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:02,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:02,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:23:02,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-11-13 18:23:02,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:02,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191190451] [2021-11-13 18:23:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:02,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:02,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:02,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191190451] [2021-11-13 18:23:02,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191190451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:02,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:02,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:02,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046300408] [2021-11-13 18:23:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:02,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:02,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:02,875 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) [2021-11-13 18:23:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:03,029 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-13 18:23:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:03,030 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 [2021-11-13 18:23:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:03,031 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:23:03,032 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 18:23:03,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:23:03,034 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:03,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 129.64ms Time] [2021-11-13 18:23:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 18:23:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-13 18:23:03,041 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) [2021-11-13 18:23:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-11-13 18:23:03,043 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-11-13 18:23:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:03,043 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-11-13 18:23:03,044 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) [2021-11-13 18:23:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-11-13 18:23:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:23:03,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:03,045 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:23:03,046 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-11-13 18:23:03,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:03,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670310844] [2021-11-13 18:23:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:23:03,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:03,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670310844] [2021-11-13 18:23:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670310844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:03,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:03,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:23:03,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969948813] [2021-11-13 18:23:03,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:03,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:23:03,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:23:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:03,167 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) [2021-11-13 18:23:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:03,298 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-13 18:23:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:03,299 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 [2021-11-13 18:23:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:03,300 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:23:03,300 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:23:03,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:03,303 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:03,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 59 Invalid, 71 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 111.82ms Time] [2021-11-13 18:23:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:23:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-13 18:23:03,310 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) [2021-11-13 18:23:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-13 18:23:03,311 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-11-13 18:23:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:03,312 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-13 18:23:03,312 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) [2021-11-13 18:23:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-13 18:23:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:23:03,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:03,314 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:03,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:23:03,314 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-11-13 18:23:03,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:03,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530340561] [2021-11-13 18:23:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:03,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:03,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530340561] [2021-11-13 18:23:03,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530340561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:03,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253621023] [2021-11-13 18:23:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:03,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:03,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:23:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:23:03,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:03,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:23:03,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253621023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:03,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:23:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-11-13 18:23:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889825865] [2021-11-13 18:23:03,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:03,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:23:03,685 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) [2021-11-13 18:23:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:03,732 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-13 18:23:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:03,733 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 [2021-11-13 18:23:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:03,735 INFO L225 Difference]: With dead ends: 109 [2021-11-13 18:23:03,735 INFO L226 Difference]: Without dead ends: 109 [2021-11-13 18:23:03,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:23:03,737 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 145 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:03,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 103 Invalid, 30 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 38.55ms Time] [2021-11-13 18:23:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-13 18:23:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-11-13 18:23:03,745 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) [2021-11-13 18:23:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-11-13 18:23:03,746 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-11-13 18:23:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:03,747 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-11-13 18:23:03,747 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) [2021-11-13 18:23:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-11-13 18:23:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:23:03,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:03,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:03,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:03,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:03,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-11-13 18:23:03,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:03,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340369065] [2021-11-13 18:23:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:04,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:04,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:04,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340369065] [2021-11-13 18:23:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340369065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:04,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401461313] [2021-11-13 18:23:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:04,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:04,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:04,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:23:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:23:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:04,479 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 [2021-11-13 18:23:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:04,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401461313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:23:04,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:23:04,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2021-11-13 18:23:04,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561531662] [2021-11-13 18:23:04,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:23:04,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:23:04,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:23:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:23:04,850 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-11-13 18:23:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:05,517 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-11-13 18:23:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:23:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 [2021-11-13 18:23:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:05,520 INFO L225 Difference]: With dead ends: 123 [2021-11-13 18:23:05,520 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 18:23:05,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:23:05,522 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 119 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 440.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.08ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 524.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:05,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 401 Invalid, 482 Unknown, 0 Unchecked, 9.08ms Time], IncrementalHoareTripleChecker [14 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 524.36ms Time] [2021-11-13 18:23:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 18:23:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-11-13 18:23:05,548 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) [2021-11-13 18:23:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-11-13 18:23:05,550 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-11-13 18:23:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:05,551 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-11-13 18:23:05,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-11-13 18:23:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-11-13 18:23:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:23:05,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:05,556 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:05,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:05,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:23:05,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:05,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-11-13 18:23:05,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:05,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840892627] [2021-11-13 18:23:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:05,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:05,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:05,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:05,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840892627] [2021-11-13 18:23:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840892627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:05,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375309340] [2021-11-13 18:23:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:05,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:05,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:05,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:05,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:23:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:23:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:06,099 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 [2021-11-13 18:23:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:06,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:06,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375309340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:23:06,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:23:06,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2021-11-13 18:23:06,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206173448] [2021-11-13 18:23:06,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:23:06,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:23:06,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:23:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:23:06,521 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-11-13 18:23:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:06,770 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-13 18:23:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 [2021-11-13 18:23:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:06,772 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:23:06,772 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 18:23:06,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:23:06,774 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.07ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:06,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 120 Invalid, 200 Unknown, 0 Unchecked, 4.07ms Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 189.60ms Time] [2021-11-13 18:23:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 18:23:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-11-13 18:23:06,781 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) [2021-11-13 18:23:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-13 18:23:06,782 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-11-13 18:23:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:06,783 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-13 18:23:06,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-11-13 18:23:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-13 18:23:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:23:06,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:06,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:06,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 18:23:07,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:07,010 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-11-13 18:23:07,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:07,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399867268] [2021-11-13 18:23:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:07,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:23:07,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:07,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399867268] [2021-11-13 18:23:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399867268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:07,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:07,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:07,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111155733] [2021-11-13 18:23:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:07,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:07,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:07,100 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) [2021-11-13 18:23:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:07,204 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-13 18:23:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:07,205 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 [2021-11-13 18:23:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:07,206 INFO L225 Difference]: With dead ends: 80 [2021-11-13 18:23:07,206 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 18:23:07,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:07,208 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 97 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 87.33ms Time] [2021-11-13 18:23:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 18:23:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-11-13 18:23:07,214 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) [2021-11-13 18:23:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-13 18:23:07,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-11-13 18:23:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:07,216 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-13 18:23:07,217 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) [2021-11-13 18:23:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-13 18:23:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:23:07,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:07,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:07,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:23:07,219 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-11-13 18:23:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:07,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66152828] [2021-11-13 18:23:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:07,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:23:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:07,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:07,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66152828] [2021-11-13 18:23:07,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66152828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:07,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537553904] [2021-11-13 18:23:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:07,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:07,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:07,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:23:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:23:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:07,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:07,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-13 18:23:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:07,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537553904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:23:07,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:23:07,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-11-13 18:23:07,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106542944] [2021-11-13 18:23:07,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:23:07,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:23:07,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:23:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:23:07,755 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-11-13 18:23:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:08,011 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-13 18:23:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:23:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 [2021-11-13 18:23:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:08,014 INFO L225 Difference]: With dead ends: 79 [2021-11-13 18:23:08,014 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 18:23:08,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:23:08,015 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 138 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.47ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:08,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 129 Invalid, 214 Unknown, 0 Unchecked, 4.47ms Time], IncrementalHoareTripleChecker [14 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 181.63ms Time] [2021-11-13 18:23:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 18:23:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-11-13 18:23:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) 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) [2021-11-13 18:23:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-13 18:23:08,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 17 [2021-11-13 18:23:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:08,032 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-13 18:23:08,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-11-13 18:23:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-13 18:23:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:23:08,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:08,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:08,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:23:08,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-11-13 18:23:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-11-13 18:23:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:08,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909871304] [2021-11-13 18:23:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:08,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:23:08,280 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:23:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:23:08,327 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:23:08,328 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:23:08,329 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION (22 of 23 remaining) [2021-11-13 18:23:08,335 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-11-13 18:23:08,335 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-11-13 18:23:08,335 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (19 of 23 remaining) [2021-11-13 18:23:08,335 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (18 of 23 remaining) [2021-11-13 18:23:08,336 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (17 of 23 remaining) [2021-11-13 18:23:08,336 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (16 of 23 remaining) [2021-11-13 18:23:08,336 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-11-13 18:23:08,336 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-11-13 18:23:08,336 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-11-13 18:23:08,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (12 of 23 remaining) [2021-11-13 18:23:08,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (11 of 23 remaining) [2021-11-13 18:23:08,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (10 of 23 remaining) [2021-11-13 18:23:08,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (9 of 23 remaining) [2021-11-13 18:23:08,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (8 of 23 remaining) [2021-11-13 18:23:08,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (7 of 23 remaining) [2021-11-13 18:23:08,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (6 of 23 remaining) [2021-11-13 18:23:08,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (5 of 23 remaining) [2021-11-13 18:23:08,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (4 of 23 remaining) [2021-11-13 18:23:08,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (3 of 23 remaining) [2021-11-13 18:23:08,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (2 of 23 remaining) [2021-11-13 18:23:08,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (1 of 23 remaining) [2021-11-13 18:23:08,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK (0 of 23 remaining) [2021-11-13 18:23:08,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:23:08,344 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:08,349 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:23:08,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:23:08 BoogieIcfgContainer [2021-11-13 18:23:08,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:23:08,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:23:08,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:23:08,391 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:23:08,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:01" (3/4) ... [2021-11-13 18:23:08,394 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 18:23:08,467 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36cff00-c22f-44a3-a6eb-05f01959c2ad/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:23:08,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:23:08,468 INFO L158 Benchmark]: Toolchain (without parser) took 8907.73ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 51.3MB in the beginning and 101.1MB in the end (delta: -49.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:23:08,468 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 94.4MB. Free memory is still 68.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:23:08,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 641.63ms. Allocated memory is still 94.4MB. Free memory was 51.1MB in the beginning and 63.1MB in the end (delta: -12.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:23:08,470 INFO L158 Benchmark]: Boogie Preprocessor took 81.87ms. Allocated memory is still 94.4MB. Free memory was 63.1MB in the beginning and 60.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:23:08,470 INFO L158 Benchmark]: RCFGBuilder took 883.42ms. Allocated memory is still 94.4MB. Free memory was 60.5MB in the beginning and 39.7MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-13 18:23:08,471 INFO L158 Benchmark]: TraceAbstraction took 7215.64ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 39.2MB in the beginning and 103.2MB in the end (delta: -64.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:23:08,471 INFO L158 Benchmark]: Witness Printer took 77.47ms. Allocated memory is still 138.4MB. Free memory was 103.2MB in the beginning and 101.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:23:08,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 94.4MB. Free memory is still 68.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 641.63ms. Allocated memory is still 94.4MB. Free memory was 51.1MB in the beginning and 63.1MB in the end (delta: -12.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.87ms. Allocated memory is still 94.4MB. Free memory was 63.1MB in the beginning and 60.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 883.42ms. Allocated memory is still 94.4MB. Free memory was 60.5MB in the beginning and 39.7MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 7215.64ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 39.2MB in the beginning and 103.2MB in the end (delta: -64.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 77.47ms. Allocated memory is still 138.4MB. Free memory was 103.2MB in the beginning and 101.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i