./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ceec10d001c6e3ab8acae30cb42f114023e2890 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:10,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:10,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:10,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:10,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:10,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:10,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:10,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:10,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:10,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:10,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:10,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:10,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:10,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:10,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:10,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:10,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:10,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:10,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:10,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:10,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:10,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:10,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:10,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:10,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:10,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:10,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:10,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:10,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:10,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:10,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:10,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:10,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:10,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:10,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:10,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:10,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:10,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:10,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:10,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:10,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:10,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:06:10,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:10,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:10,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:10,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:10,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:10,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:10,192 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:10,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:10,193 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:06:10,194 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:06:10,194 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:06:10,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:10,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:06:10,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:10,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:10,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:10,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:10,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:10,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:10,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:10,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:10,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:10,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:10,197 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_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ceec10d001c6e3ab8acae30cb42f114023e2890 [2021-10-15 19:06:10,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:10,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:10,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:10,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:10,501 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:10,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2021-10-15 19:06:10,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/data/b00cae8e0/c56a1798918048b284ad4ff31530f054/FLAG70297a3f1 [2021-10-15 19:06:11,081 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:11,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2021-10-15 19:06:11,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/data/b00cae8e0/c56a1798918048b284ad4ff31530f054/FLAG70297a3f1 [2021-10-15 19:06:11,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/data/b00cae8e0/c56a1798918048b284ad4ff31530f054 [2021-10-15 19:06:11,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:11,386 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:06:11,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:11,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:11,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:11,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2fe2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11, skipping insertion in model container [2021-10-15 19:06:11,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:11,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:11,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:11,833 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:11,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:11,900 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:11,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11 WrapperNode [2021-10-15 19:06:11,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:11,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:11,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:11,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:11,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:11,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:11,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:11,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:11,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:12,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:12,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:06:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:06:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:06:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:06:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:06:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:06:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:06:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:06:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:06:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:06:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:06:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:06:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:06:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:06:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:06:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:06:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:06:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:06:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:06:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:06:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:06:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:06:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:06:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:06:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:06:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:06:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:06:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:06:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:06:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:06:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:06:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:06:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:06:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:06:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:06:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:06:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:06:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:06:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:06:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:06:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:06:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:06:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:06:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:06:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:06:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:06:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:06:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:06:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:06:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:06:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:06:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:06:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:06:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:06:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:06:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:06:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:06:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:06:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:06:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:06:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:06:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:06:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:06:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:06:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:06:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:06:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:06:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:06:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:06:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:06:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:06:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:06:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:06:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:06:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:06:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:06:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:06:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:06:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:06:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:06:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:06:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:06:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:06:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:06:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:06:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:06:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:06:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:06:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:06:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:06:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:06:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:06:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:06:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:06:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:06:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:06:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:06:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:06:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:06:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:06:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:06:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:06:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:12,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:12,533 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 19:06:12,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:12 BoogieIcfgContainer [2021-10-15 19:06:12,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:12,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:12,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:12,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:12,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:11" (1/3) ... [2021-10-15 19:06:12,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a29c9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:12, skipping insertion in model container [2021-10-15 19:06:12,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11" (2/3) ... [2021-10-15 19:06:12,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a29c9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:12, skipping insertion in model container [2021-10-15 19:06:12,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:12" (3/3) ... [2021-10-15 19:06:12,558 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe.i [2021-10-15 19:06:12,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:12,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:06:12,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:12,626 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:06:12,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:06:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:06:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:06:12,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:06:12,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:12,652 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 2 more)] === [2021-10-15 19:06:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:12,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1489715982, now seen corresponding path program 1 times [2021-10-15 19:06:12,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:12,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401167861] [2021-10-15 19:06:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:12,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:12,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:12,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877771285] [2021-10-15 19:06:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:12,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:12,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:12,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:06:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:13,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401167861] [2021-10-15 19:06:13,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:13,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877771285] [2021-10-15 19:06:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877771285] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:13,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:13,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:06:13,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916843247] [2021-10-15 19:06:13,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:13,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:13,270 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:06:13,341 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-10-15 19:06:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) Word has length 12 [2021-10-15 19:06:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:06:13,355 INFO L225 Difference]: With dead ends: 33 [2021-10-15 19:06:13,355 INFO L226 Difference]: Without dead ends: 30 [2021-10-15 19:06:13,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-15 19:06:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-15 19:06:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.5) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-15 19:06:13,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 12 [2021-10-15 19:06:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:06:13,400 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-15 19:06:13,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-15 19:06:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 19:06:13,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:06:13,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:13,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:13,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-15 19:06:13,618 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 2 more)] === [2021-10-15 19:06:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:13,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1063444840, now seen corresponding path program 1 times [2021-10-15 19:06:13,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:13,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265475221] [2021-10-15 19:06:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:13,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:13,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:13,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105785804] [2021-10-15 19:06:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:13,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:13,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:13,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:13,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:06:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:13,858 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:06:13,859 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-15 19:06:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:13,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:13,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265475221] [2021-10-15 19:06:13,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105785804] [2021-10-15 19:06:13,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105785804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:13,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:13,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:13,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912473216] [2021-10-15 19:06:13,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:13,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:13,905 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:06:13,940 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-10-15 19:06:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-10-15 19:06:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:06:13,944 INFO L225 Difference]: With dead ends: 28 [2021-10-15 19:06:13,944 INFO L226 Difference]: Without dead ends: 28 [2021-10-15 19:06:13,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-15 19:06:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-15 19:06:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-15 19:06:13,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-15 19:06:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:06:13,954 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-15 19:06:13,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:06:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-15 19:06:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 19:06:13,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:06:13,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:13,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:14,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:14,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 2 more)] === [2021-10-15 19:06:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1063444839, now seen corresponding path program 1 times [2021-10-15 19:06:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:14,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254800298] [2021-10-15 19:06:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:14,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:14,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:14,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868266471] [2021-10-15 19:06:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:14,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:14,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:14,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:06:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:06:14,321 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:06:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:06:14,380 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:06:14,380 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:06:14,382 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:06:14,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:06:14,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:06:14,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:06:14,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-15 19:06:14,391 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-15 19:06:14,391 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:06:14,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:14,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:14,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:14,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:14 BoogieIcfgContainer [2021-10-15 19:06:14,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:14,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:14,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:14,624 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:14,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:12" (3/4) ... [2021-10-15 19:06:14,626 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:06:14,676 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264dc16d-be36-4e8e-aa3b-ee37029ce059/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:14,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:14,678 INFO L168 Benchmark]: Toolchain (without parser) took 3291.57 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 62.7 MB in the beginning and 60.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,679 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:14,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 498.47 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 73.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,680 INFO L168 Benchmark]: Boogie Preprocessor took 59.43 ms. Allocated memory is still 104.9 MB. Free memory was 73.3 MB in the beginning and 71.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,681 INFO L168 Benchmark]: RCFGBuilder took 567.91 ms. Allocated memory is still 104.9 MB. Free memory was 71.0 MB in the beginning and 52.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,685 INFO L168 Benchmark]: TraceAbstraction took 2085.81 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 51.5 MB in the beginning and 61.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,686 INFO L168 Benchmark]: Witness Printer took 53.42 ms. Allocated memory is still 125.8 MB. Free memory was 61.4 MB in the beginning and 60.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:14,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 498.47 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 73.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.43 ms. Allocated memory is still 104.9 MB. Free memory was 73.3 MB in the beginning and 71.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 567.91 ms. Allocated memory is still 104.9 MB. Free memory was 71.0 MB in the beginning and 52.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2085.81 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 51.5 MB in the beginning and 61.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Witness Printer took 53.42 ms. Allocated memory is still 125.8 MB. Free memory was 61.4 MB in the beginning and 60.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 522]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int length = __VERIFIER_nondet_int(); [L515] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L515] length = 1 VAL [length=1] [L516] int fac = __VERIFIER_nondet_int(); [L517] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L517] fac = 1 VAL [fac=1, length=1] [L518] int *arr = __builtin_alloca (length); [L519] int *arr2 = __builtin_alloca (fac*length); VAL [__builtin_alloca (fac*length)={2:0}, __builtin_alloca (length)={3:0}, arr={3:0}, arr2={2:0}, fac=1, length=1] [L520] COND FALSE !(!arr || !arr2) [L521] i=0 VAL [__builtin_alloca (fac*length)={2:0}, __builtin_alloca (length)={3:0}, arr={3:0}, arr2={2:0}, fac=1, i=0, length=1] [L521] COND TRUE i