./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/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_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be --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 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-21 20:13:08,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:13:08,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:13:08,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:13:08,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:13:08,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:13:08,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:13:08,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:13:08,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:13:08,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:13:08,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:13:08,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:13:08,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:13:08,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:13:08,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:13:08,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:13:08,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:13:08,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:13:08,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:13:08,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:13:08,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:13:08,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:13:08,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:13:08,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:13:08,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:13:08,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:13:08,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:13:08,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:13:08,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:13:08,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:13:08,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:13:08,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:13:08,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:13:08,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:13:08,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:13:08,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:13:08,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:13:08,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:13:08,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:13:08,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:13:08,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:13:08,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:13:08,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:13:08,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:13:08,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:13:08,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:13:08,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:13:08,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:13:08,391 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:13:08,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:13:08,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:13:08,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:13:08,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:13:08,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:13:08,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:13:08,392 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:13:08,392 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:13:08,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:13:08,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:13:08,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:13:08,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:13:08,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:13:08,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:13:08,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:13:08,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:13:08,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:13:08,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:13:08,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:13:08,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:13:08,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:13:08,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:13:08,396 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_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 [2021-10-21 20:13:08,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:13:08,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:13:08,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:13:08,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:13:08,751 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:13:08,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-21 20:13:08,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/data/e441ba351/7968fbf8fa84496d95d0e019b1e559f5/FLAG9040dc437 [2021-10-21 20:13:09,361 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:13:09,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-21 20:13:09,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/data/e441ba351/7968fbf8fa84496d95d0e019b1e559f5/FLAG9040dc437 [2021-10-21 20:13:09,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/data/e441ba351/7968fbf8fa84496d95d0e019b1e559f5 [2021-10-21 20:13:09,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:13:09,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:13:09,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:13:09,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:13:09,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:13:09,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:09" (1/1) ... [2021-10-21 20:13:09,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a39c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:09, skipping insertion in model container [2021-10-21 20:13:09,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:09" (1/1) ... [2021-10-21 20:13:09,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:13:09,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:13:10,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:13:10,046 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:13:10,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:13:10,134 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:13:10,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10 WrapperNode [2021-10-21 20:13:10,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:13:10,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:13:10,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:13:10,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:13:10,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:13:10,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:13:10,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:13:10,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:13:10,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (1/1) ... [2021-10-21 20:13:10,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:13:10,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:10,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:13:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:13:10,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:13:10,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:13:10,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:13:10,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:13:10,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:13:10,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:13:10,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:13:10,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:13:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:13:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:13:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:13:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:13:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:13:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:13:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:13:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:13:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:13:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:13:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:13:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:13:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:13:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:13:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:13:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:13:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:13:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:13:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:13:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:13:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:13:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:13:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:13:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:13:10,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:13:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:13:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:13:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:13:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:13:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 20:13:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:13:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:13:10,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:13:10,804 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 20:13:10,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:10 BoogieIcfgContainer [2021-10-21 20:13:10,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:13:10,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:13:10,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:13:10,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:13:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:13:09" (1/3) ... [2021-10-21 20:13:10,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a9409e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:13:10, skipping insertion in model container [2021-10-21 20:13:10,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:10" (2/3) ... [2021-10-21 20:13:10,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a9409e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:13:10, skipping insertion in model container [2021-10-21 20:13:10,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:10" (3/3) ... [2021-10-21 20:13:10,831 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-21 20:13:10,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:13:10,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-21 20:13:10,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:13:10,894 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 [2021-10-21 20:13:10,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-21 20:13:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:13:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:13:10,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:10,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:10,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-10-21 20:13:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:10,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692613427] [2021-10-21 20:13:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:10,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:11,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:11,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692613427] [2021-10-21 20:13:11,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692613427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:11,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:11,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:13:11,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902482582] [2021-10-21 20:13:11,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:13:11,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:13:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:13:11,377 INFO L87 Difference]: Start difference. First operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:11,772 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-10-21 20:13:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:13:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:11,788 INFO L225 Difference]: With dead ends: 125 [2021-10-21 20:13:11,789 INFO L226 Difference]: Without dead ends: 121 [2021-10-21 20:13:11,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-21 20:13:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-10-21 20:13:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-21 20:13:11,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-10-21 20:13:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:11,843 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-21 20:13:11,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-21 20:13:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:13:11,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:11,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:11,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:13:11,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:11,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-10-21 20:13:11,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:11,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907026722] [2021-10-21 20:13:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:11,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:11,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:11,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907026722] [2021-10-21 20:13:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907026722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:11,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:13:11,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881942132] [2021-10-21 20:13:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:11,966 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:12,066 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-21 20:13:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:13:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:13:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:12,072 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:13:12,072 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:13:12,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:13:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:13:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-21 20:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-10-21 20:13:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:12,090 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-21 20:13:12,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-21 20:13:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:13:12,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:12,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:13:12,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-10-21 20:13:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:12,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740900110] [2021-10-21 20:13:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:12,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:12,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:12,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740900110] [2021-10-21 20:13:12,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740900110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:12,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:12,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:13:12,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543912786] [2021-10-21 20:13:12,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:12,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:12,252 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:12,378 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-21 20:13:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:13:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:13:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:12,387 INFO L225 Difference]: With dead ends: 64 [2021-10-21 20:13:12,387 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:13:12,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:13:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:13:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-10-21 20:13:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.631578947368421) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-10-21 20:13:12,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-10-21 20:13:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:12,405 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-10-21 20:13:12,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-10-21 20:13:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:13:12,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:12,406 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:12,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:13:12,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-10-21 20:13:12,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:12,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795177111] [2021-10-21 20:13:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:12,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:13:12,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:12,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795177111] [2021-10-21 20:13:12,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795177111] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:12,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:12,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:13:12,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601646950] [2021-10-21 20:13:12,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:12,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:12,520 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:12,614 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-21 20:13:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:13:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:13:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:12,616 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:13:12,616 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:13:12,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:13:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:13:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-21 20:13:12,633 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-10-21 20:13:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:12,633 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-21 20:13:12,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-21 20:13:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:13:12,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:12,635 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:13:12,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-10-21 20:13:12,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:12,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487834407] [2021-10-21 20:13:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:12,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:12,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:12,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487834407] [2021-10-21 20:13:12,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487834407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:12,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524023367] [2021-10-21 20:13:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:12,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:12,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:13:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:13:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524023367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:13,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-21 20:13:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471964885] [2021-10-21 20:13:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:13:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:13:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:13,091 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:13,135 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-21 20:13:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:13:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:13:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:13,137 INFO L225 Difference]: With dead ends: 109 [2021-10-21 20:13:13,138 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 20:13:13,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 20:13:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-10-21 20:13:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-21 20:13:13,143 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-10-21 20:13:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-21 20:13:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-21 20:13:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:13:13,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:13,145 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:13,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:13,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:13,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-10-21 20:13:13,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:13,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986561047] [2021-10-21 20:13:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:13,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:13,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:13,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986561047] [2021-10-21 20:13:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986561047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628999068] [2021-10-21 20:13:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:13,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:13,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:13,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:13:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:13:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-10-21 20:13:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:13,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628999068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:13,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:13,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-10-21 20:13:13,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340780742] [2021-10-21 20:13:13,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:13:13,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:13:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:13:13,918 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:14,258 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-10-21 20:13:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:13:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:13:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:14,260 INFO L225 Difference]: With dead ends: 123 [2021-10-21 20:13:14,260 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 20:13:14,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:13:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 20:13:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-10-21 20:13:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-21 20:13:14,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-10-21 20:13:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-21 20:13:14,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-21 20:13:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:13:14,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:14,267 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:14,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:14,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:14,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-10-21 20:13:14,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:14,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990865225] [2021-10-21 20:13:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:14,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:14,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:14,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990865225] [2021-10-21 20:13:14,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990865225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:14,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648181387] [2021-10-21 20:13:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:14,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:14,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:14,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:14,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:13:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:13:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:14,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-21 20:13:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648181387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:14,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-21 20:13:14,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038611569] [2021-10-21 20:13:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:13:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:13:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:14,849 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:15,047 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-21 20:13:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:13:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:13:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:15,048 INFO L225 Difference]: With dead ends: 74 [2021-10-21 20:13:15,048 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 20:13:15,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 20:13:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-10-21 20:13:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-21 20:13:15,053 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-10-21 20:13:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:15,053 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-21 20:13:15,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-21 20:13:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:13:15,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:15,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:15,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:15,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:15,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-10-21 20:13:15,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:15,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925760878] [2021-10-21 20:13:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:15,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:13:15,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:15,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925760878] [2021-10-21 20:13:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925760878] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:15,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:15,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:13:15,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44376155] [2021-10-21 20:13:15,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:13:15,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:13:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:15,309 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:15,401 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-21 20:13:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:13:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:13:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:15,403 INFO L225 Difference]: With dead ends: 80 [2021-10-21 20:13:15,403 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 20:13:15,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 20:13:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-10-21 20:13:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.46) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-21 20:13:15,415 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-10-21 20:13:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:15,415 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-21 20:13:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-21 20:13:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:13:15,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:15,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:15,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:13:15,419 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-10-21 20:13:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:15,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769149157] [2021-10-21 20:13:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:15,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:13:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:15,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:15,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769149157] [2021-10-21 20:13:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769149157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:15,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415096432] [2021-10-21 20:13:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:15,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:15,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:15,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:13:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:13:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415096432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:15,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:13:15,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-10-21 20:13:15,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683085798] [2021-10-21 20:13:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:13:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:13:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:13:15,791 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:15,985 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-21 20:13:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:13:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:13:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:15,987 INFO L225 Difference]: With dead ends: 81 [2021-10-21 20:13:15,987 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 20:13:15,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:13:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 20:13:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-10-21 20:13:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-21 20:13:15,992 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 17 [2021-10-21 20:13:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-21 20:13:15,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:13:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-21 20:13:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:13:15,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:15,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:16,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:16,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 20:13:16,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-21 20:13:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-10-21 20:13:16,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:16,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513021653] [2021-10-21 20:13:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:16,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:13:16,213 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:13:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:13:16,241 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:13:16,241 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:13:16,242 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION [2021-10-21 20:13:16,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:13:16,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:13:16,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:13:16,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 20:13:16,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 20:13:16,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-21 20:13:16,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:13:16,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:13:16,254 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:13:16,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:13:16 BoogieIcfgContainer [2021-10-21 20:13:16,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:13:16,286 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:13:16,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:13:16,286 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:13:16,286 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:10" (3/4) ... [2021-10-21 20:13:16,288 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:13:16,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57b7839-6289-444a-8fb8-b44e465e20bd/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:13:16,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:13:16,334 INFO L168 Benchmark]: Toolchain (without parser) took 6662.53 ms. Allocated memory was 102.8 MB in the beginning and 161.5 MB in the end (delta: 58.7 MB). Free memory was 69.0 MB in the beginning and 107.8 MB in the end (delta: -38.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:13:16,334 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 102.8 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:13:16,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.17 ms. Allocated memory was 102.8 MB in the beginning and 134.2 MB in the end (delta: 31.5 MB). Free memory was 69.0 MB in the beginning and 102.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:13:16,335 INFO L168 Benchmark]: Boogie Preprocessor took 57.11 ms. Allocated memory is still 134.2 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:13:16,335 INFO L168 Benchmark]: RCFGBuilder took 612.44 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:13:16,336 INFO L168 Benchmark]: TraceAbstraction took 5476.38 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 79.0 MB in the beginning and 108.8 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:13:16,336 INFO L168 Benchmark]: Witness Printer took 46.45 ms. Allocated memory is still 161.5 MB. Free memory was 108.8 MB in the beginning and 107.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:13:16,338 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 102.8 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 464.17 ms. Allocated memory was 102.8 MB in the beginning and 134.2 MB in the end (delta: 31.5 MB). Free memory was 69.0 MB in the beginning and 102.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.11 ms. Allocated memory is still 134.2 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 612.44 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5476.38 ms. Allocated memory was 134.2 MB in the beginning and 161.5 MB in the end (delta: 27.3 MB). Free memory was 79.0 MB in the beginning and 108.8 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 46.45 ms. Allocated memory is still 161.5 MB. Free memory was 108.8 MB in the beginning and 107.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i