./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e28603c63113c1566dc2e06da17c63059f80486 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:20:10,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:20:10,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:20:10,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:20:10,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:20:10,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:20:10,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:20:10,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:20:10,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:20:10,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:20:10,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:20:10,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:20:10,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:20:10,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:20:10,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:20:10,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:20:10,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:20:10,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:20:10,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:20:10,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:20:10,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:20:10,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:20:10,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:20:10,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:20:10,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:20:10,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:20:10,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:20:10,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:20:10,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:20:10,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:20:10,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:20:10,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:20:10,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:20:10,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:20:10,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:20:10,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:20:10,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:20:10,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:20:10,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:20:10,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:20:10,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:20:10,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:20:10,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:20:10,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:20:10,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:20:10,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:20:10,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:20:10,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:20:10,684 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:20:10,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:20:10,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:20:10,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:20:10,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:20:10,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:20:10,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:20:10,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:20:10,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:20:10,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:20:10,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:20:10,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:20:10,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:20:10,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:20:10,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:20:10,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:20:10,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:20:10,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:20:10,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:20:10,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:20:10,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:20:10,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:20:10,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:20:10,693 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_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e28603c63113c1566dc2e06da17c63059f80486 [2021-10-13 01:20:11,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:20:11,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:20:11,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:20:11,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:20:11,055 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:20:11,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-13 01:20:11,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/data/bdef5f583/15dfa104d89d422099513b8d8bb8d735/FLAGd1dcfad9e [2021-10-13 01:20:11,660 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:20:11,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-13 01:20:11,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/data/bdef5f583/15dfa104d89d422099513b8d8bb8d735/FLAGd1dcfad9e [2021-10-13 01:20:11,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/data/bdef5f583/15dfa104d89d422099513b8d8bb8d735 [2021-10-13 01:20:11,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:20:11,956 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:20:11,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:20:11,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:20:11,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:20:11,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:20:11" (1/1) ... [2021-10-13 01:20:11,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f7d8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:11, skipping insertion in model container [2021-10-13 01:20:11,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:20:11" (1/1) ... [2021-10-13 01:20:11,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:20:12,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:20:12,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:20:12,267 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:20:12,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:20:12,334 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:20:12,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12 WrapperNode [2021-10-13 01:20:12,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:20:12,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:20:12,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:20:12,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:20:12,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:20:12,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:20:12,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:20:12,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:20:12,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (1/1) ... [2021-10-13 01:20:12,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:20:12,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:12,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:20:12,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:20:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:20:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:20:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:20:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:20:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 01:20:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 01:20:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 01:20:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:20:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:20:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:20:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:20:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:20:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:20:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:20:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:20:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:20:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:20:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:20:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:20:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:20:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:20:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 01:20:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 01:20:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 01:20:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:20:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:20:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:20:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:20:12,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:20:12,565 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:20:12,565 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:20:12,565 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:20:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:20:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:20:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:20:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:20:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:20:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:20:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:20:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:20:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:20:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:20:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:20:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:20:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:20:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:20:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:20:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:20:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:20:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:20:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:20:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:20:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:20:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:20:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:20:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:20:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:20:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:20:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:20:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:20:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:20:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:20:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:20:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:20:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:20:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:20:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:20:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:20:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:20:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:20:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:20:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:20:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:20:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:20:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:20:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:20:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:20:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:20:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:20:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:20:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:20:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:20:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:20:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:20:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:20:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:20:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:20:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:20:12,578 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:20:12,578 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:20:12,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:20:12,578 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:20:12,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:20:12,579 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:20:12,579 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:20:12,579 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:20:12,581 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:20:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:20:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:20:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:20:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:20:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:20:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:20:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:20:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:20:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:20:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:20:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:20:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:20:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:20:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:20:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:20:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:20:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:20:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:20:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:20:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:20:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:20:12,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:20:12,973 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-13 01:20:12,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:20:12 BoogieIcfgContainer [2021-10-13 01:20:12,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:20:12,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:20:12,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:20:12,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:20:12,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:20:11" (1/3) ... [2021-10-13 01:20:12,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3a1072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:20:12, skipping insertion in model container [2021-10-13 01:20:13,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:20:12" (2/3) ... [2021-10-13 01:20:13,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3a1072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:20:13, skipping insertion in model container [2021-10-13 01:20:13,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:20:12" (3/3) ... [2021-10-13 01:20:13,006 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down-alloca-1.i [2021-10-13 01:20:13,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:20:13,016 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-13 01:20:13,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:20:13,098 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:20:13,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-13 01:20:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:20:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:20:13,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:13,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:13,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2021-10-13 01:20:13,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:13,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028356906] [2021-10-13 01:20:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:13,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:13,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:13,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:13,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028356906] [2021-10-13 01:20:13,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028356906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:13,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:13,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:20:13,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858130566] [2021-10-13 01:20:13,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:20:13,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:20:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:20:13,491 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:13,622 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-13 01:20:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:20:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-10-13 01:20:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:13,637 INFO L225 Difference]: With dead ends: 36 [2021-10-13 01:20:13,637 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 01:20:13,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:20:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 01:20:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 01:20:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-13 01:20:13,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-10-13 01:20:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:13,680 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-13 01:20:13,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-13 01:20:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:20:13,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:13,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:13,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:20:13,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2021-10-13 01:20:13,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:13,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588164226] [2021-10-13 01:20:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:13,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:13,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:13,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588164226] [2021-10-13 01:20:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588164226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:13,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:13,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:20:13,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590526192] [2021-10-13 01:20:13,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:20:13,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:20:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:20:13,798 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:13,877 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-10-13 01:20:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:20:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2021-10-13 01:20:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:13,882 INFO L225 Difference]: With dead ends: 29 [2021-10-13 01:20:13,882 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 01:20:13,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:20:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 01:20:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 01:20:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-13 01:20:13,911 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2021-10-13 01:20:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:13,912 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-13 01:20:13,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-13 01:20:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:20:13,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:13,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:13,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:20:13,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2021-10-13 01:20:13,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:13,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888972595] [2021-10-13 01:20:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:13,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:14,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:14,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888972595] [2021-10-13 01:20:14,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888972595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:14,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:14,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:20:14,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400727846] [2021-10-13 01:20:14,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:20:14,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:20:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:20:14,071 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:14,219 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-10-13 01:20:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:20:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 12 [2021-10-13 01:20:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:14,226 INFO L225 Difference]: With dead ends: 33 [2021-10-13 01:20:14,226 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 01:20:14,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 01:20:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-13 01:20:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-13 01:20:14,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2021-10-13 01:20:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:14,238 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-13 01:20:14,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-13 01:20:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 01:20:14,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:14,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:14,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:20:14,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash 467596310, now seen corresponding path program 1 times [2021-10-13 01:20:14,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:14,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738905988] [2021-10-13 01:20:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:14,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:14,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:14,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738905988] [2021-10-13 01:20:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738905988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:14,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900723954] [2021-10-13 01:20:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:14,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:14,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:14,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:20:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:20:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:14,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900723954] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:14,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:20:14,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-13 01:20:14,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150124990] [2021-10-13 01:20:14,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:20:14,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:20:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:14,647 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:14,679 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-10-13 01:20:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:20:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2021-10-13 01:20:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:14,681 INFO L225 Difference]: With dead ends: 54 [2021-10-13 01:20:14,681 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 01:20:14,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 01:20:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-13 01:20:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-13 01:20:14,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2021-10-13 01:20:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-13 01:20:14,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-13 01:20:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 01:20:14,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:14,690 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:14,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:14,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:14,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 74569300, now seen corresponding path program 1 times [2021-10-13 01:20:14,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:14,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280896347] [2021-10-13 01:20:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:14,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:15,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:15,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280896347] [2021-10-13 01:20:15,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280896347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:15,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998547735] [2021-10-13 01:20:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:15,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:15,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:15,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:20:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:20:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:15,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 01:20:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:15,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998547735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:15,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:15,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-10-13 01:20:15,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797838792] [2021-10-13 01:20:15,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:20:15,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:20:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:20:15,502 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:15,629 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-13 01:20:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:20:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 16 [2021-10-13 01:20:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:15,633 INFO L225 Difference]: With dead ends: 39 [2021-10-13 01:20:15,634 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 01:20:15,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:20:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 01:20:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-10-13 01:20:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-13 01:20:15,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2021-10-13 01:20:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:15,651 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-13 01:20:15,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-13 01:20:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 01:20:15,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:15,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:15,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:15,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:15,876 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1610534241, now seen corresponding path program 1 times [2021-10-13 01:20:15,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:15,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715558589] [2021-10-13 01:20:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:15,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:16,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:16,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:16,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715558589] [2021-10-13 01:20:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715558589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:16,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905640144] [2021-10-13 01:20:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:16,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:16,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:20:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:20:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:16,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905640144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:16,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:16,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-10-13 01:20:16,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469942611] [2021-10-13 01:20:16,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:20:16,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:16,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:20:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:20:16,364 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:16,556 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-10-13 01:20:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:20:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 01:20:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:16,558 INFO L225 Difference]: With dead ends: 50 [2021-10-13 01:20:16,559 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 01:20:16,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:20:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 01:20:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-10-13 01:20:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-10-13 01:20:16,565 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 17 [2021-10-13 01:20:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:16,566 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-10-13 01:20:16,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-10-13 01:20:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:20:16,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:16,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:16,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:16,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:16,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047272, now seen corresponding path program 1 times [2021-10-13 01:20:16,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:16,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263304468] [2021-10-13 01:20:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:16,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:16,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:20:16,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:16,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263304468] [2021-10-13 01:20:16,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263304468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:16,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:20:16,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746859271] [2021-10-13 01:20:16,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:20:16,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:20:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:20:16,871 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:16,935 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-10-13 01:20:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:20:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 18 [2021-10-13 01:20:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:16,938 INFO L225 Difference]: With dead ends: 44 [2021-10-13 01:20:16,938 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 01:20:16,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:20:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 01:20:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-10-13 01:20:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-13 01:20:16,951 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2021-10-13 01:20:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:16,951 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-13 01:20:16,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-13 01:20:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 01:20:16,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:16,953 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:16,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 01:20:16,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2133289012, now seen corresponding path program 1 times [2021-10-13 01:20:16,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:16,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152841877] [2021-10-13 01:20:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:16,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:20:17,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:17,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152841877] [2021-10-13 01:20:17,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152841877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:17,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135229789] [2021-10-13 01:20:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:17,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:17,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:17,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:20:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:20:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:20:17,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135229789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:17,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:20:17,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-13 01:20:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859099238] [2021-10-13 01:20:17,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:20:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:20:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:17,341 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:17,379 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-10-13 01:20:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:20:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 21 [2021-10-13 01:20:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:17,382 INFO L225 Difference]: With dead ends: 56 [2021-10-13 01:20:17,383 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 01:20:17,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 01:20:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-10-13 01:20:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-13 01:20:17,401 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2021-10-13 01:20:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:17,402 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-13 01:20:17,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-13 01:20:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 01:20:17,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:17,405 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:17,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:17,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:17,632 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash 853425334, now seen corresponding path program 1 times [2021-10-13 01:20:17,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:17,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081517038] [2021-10-13 01:20:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:17,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:17,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:17,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081517038] [2021-10-13 01:20:17,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081517038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694775899] [2021-10-13 01:20:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:17,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:17,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:20:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:20:17,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694775899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:18,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:18,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-10-13 01:20:18,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813497160] [2021-10-13 01:20:18,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:20:18,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:20:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:20:18,007 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:18,198 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-10-13 01:20:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:20:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 21 [2021-10-13 01:20:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:18,204 INFO L225 Difference]: With dead ends: 73 [2021-10-13 01:20:18,204 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 01:20:18,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:20:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 01:20:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-10-13 01:20:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-10-13 01:20:18,226 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 21 [2021-10-13 01:20:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:18,226 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-10-13 01:20:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-10-13 01:20:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:20:18,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:18,232 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, 1] [2021-10-13 01:20:18,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:18,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:18,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1707448741, now seen corresponding path program 1 times [2021-10-13 01:20:18,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:18,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962353599] [2021-10-13 01:20:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:18,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 01:20:18,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:18,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962353599] [2021-10-13 01:20:18,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962353599] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:18,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:18,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:20:18,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241965393] [2021-10-13 01:20:18,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:20:18,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:20:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:20:18,539 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:18,588 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-10-13 01:20:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:20:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 22 [2021-10-13 01:20:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:18,589 INFO L225 Difference]: With dead ends: 56 [2021-10-13 01:20:18,590 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 01:20:18,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:20:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 01:20:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-13 01:20:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-10-13 01:20:18,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2021-10-13 01:20:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-10-13 01:20:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-10-13 01:20:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:20:18,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:18,599 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:20:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 01:20:18,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-13 01:20:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1009154207, now seen corresponding path program 2 times [2021-10-13 01:20:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:18,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342755890] [2021-10-13 01:20:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:18,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:18,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:18,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342755890] [2021-10-13 01:20:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342755890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:18,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091983765] [2021-10-13 01:20:18,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:20:18,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:18,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:18,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:18,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:20:18,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:20:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:20:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:20:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 01:20:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 01:20:19,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091983765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:19,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:19,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-10-13 01:20:19,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312571262] [2021-10-13 01:20:19,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:20:19,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:20:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:20:19,306 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:19,591 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-10-13 01:20:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:20:19,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 25 [2021-10-13 01:20:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:19,592 INFO L225 Difference]: With dead ends: 36 [2021-10-13 01:20:19,592 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 01:20:19,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:20:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 01:20:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 01:20:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:20:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 01:20:19,594 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-10-13 01:20:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:20:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:20:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 01:20:19,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 01:20:19,597 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:20:19,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:20:19,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-13 01:20:19,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-13 01:20:19,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-13 01:20:19,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-13 01:20:19,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-13 01:20:19,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-13 01:20:19,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:20:19,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:19,819 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:20:19,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:20:19 BoogieIcfgContainer [2021-10-13 01:20:19,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:20:19,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:20:19,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:20:19,822 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:20:19,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:20:12" (3/4) ... [2021-10-13 01:20:19,826 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 01:20:19,835 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 01:20:19,835 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-13 01:20:19,836 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-13 01:20:19,836 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-13 01:20:19,836 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-13 01:20:19,836 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 01:20:19,836 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-13 01:20:19,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-13 01:20:19,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 01:20:19,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 01:20:19,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 01:20:19,873 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:20:19,873 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:20:19,874 INFO L168 Benchmark]: Toolchain (without parser) took 7917.08 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 83.3 MB in the beginning and 97.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,875 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 59.6 MB in the beginning and 59.6 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:20:19,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.07 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 68.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,875 INFO L168 Benchmark]: Boogie Preprocessor took 56.17 ms. Allocated memory is still 104.9 MB. Free memory was 68.1 MB in the beginning and 65.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,876 INFO L168 Benchmark]: RCFGBuilder took 582.60 ms. Allocated memory is still 104.9 MB. Free memory was 65.6 MB in the beginning and 65.3 MB in the end (delta: 276.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,876 INFO L168 Benchmark]: TraceAbstraction took 6844.61 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 64.8 MB in the beginning and 100.5 MB in the end (delta: -35.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:20:19,877 INFO L168 Benchmark]: Witness Printer took 50.89 ms. Allocated memory is still 130.0 MB. Free memory was 100.5 MB in the beginning and 97.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 59.6 MB in the beginning and 59.6 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.07 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 68.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.17 ms. Allocated memory is still 104.9 MB. Free memory was 68.1 MB in the beginning and 65.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 582.60 ms. Allocated memory is still 104.9 MB. Free memory was 65.6 MB in the beginning and 65.3 MB in the end (delta: 276.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6844.61 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 64.8 MB in the beginning and 100.5 MB in the end (delta: -35.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 50.89 ms. Allocated memory is still 130.0 MB. Free memory was 100.5 MB in the beginning and 97.5 MB in the end (delta: 2.9 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 - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 51 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 6737.4ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 25.9ms, AutomataDifference: 1437.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 233 SDtfs, 571 SDslu, 401 SDs, 0 SdLazy, 802 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 707.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 832.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=9, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 145.7ms AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.8ms SsaConstructionTime, 283.3ms SatisfiabilityAnalysisTime, 2343.2ms InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 1547 SizeOfPredicates, 15 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 24/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 01:20:19,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981a4885-a2eb-4109-be85-690a5dfa8db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...