./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:40:12,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:40:12,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:40:12,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:40:12,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:40:12,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:40:12,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:40:12,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:40:12,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:40:12,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:40:12,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:40:12,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:40:12,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:40:12,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:40:12,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:40:12,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:40:12,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:40:12,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:40:12,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:40:12,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:40:12,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:40:12,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:40:12,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:40:12,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:40:12,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:40:12,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:40:12,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:40:12,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:40:12,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:40:12,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:40:12,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:40:12,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:40:12,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:40:12,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:40:12,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:40:12,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:40:12,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:40:12,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:40:12,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:40:12,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:40:12,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:40:12,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:40:12,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:40:12,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:40:12,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:40:12,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:40:13,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:40:13,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:40:13,001 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:40:13,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:40:13,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:40:13,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:40:13,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:40:13,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:40:13,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:40:13,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:40:13,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:40:13,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:40:13,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:40:13,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:40:13,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:40:13,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:40:13,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:40:13,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:40:13,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:40:13,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:40:13,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:40:13,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:40:13,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:40:13,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:40:13,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:40:13,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:40:13,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:40:13,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:40:13,008 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_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 [2021-11-23 13:40:13,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:40:13,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:40:13,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:40:13,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:40:13,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:40:13,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-programs/copysome2-2.i [2021-11-23 13:40:13,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/data/6a37c7ac7/c9f3b60ab18a4db8b5b1cca75c20406e/FLAGf3456aee8 [2021-11-23 13:40:14,204 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:40:14,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/sv-benchmarks/c/array-programs/copysome2-2.i [2021-11-23 13:40:14,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/data/6a37c7ac7/c9f3b60ab18a4db8b5b1cca75c20406e/FLAGf3456aee8 [2021-11-23 13:40:14,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/data/6a37c7ac7/c9f3b60ab18a4db8b5b1cca75c20406e [2021-11-23 13:40:14,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:40:14,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:40:14,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:40:14,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:40:14,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:40:14,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:14,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f07f475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14, skipping insertion in model container [2021-11-23 13:40:14,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:14,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:40:14,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:40:14,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2021-11-23 13:40:14,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:40:14,873 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:40:14,893 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2021-11-23 13:40:14,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:40:14,941 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:40:14,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14 WrapperNode [2021-11-23 13:40:14,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:40:14,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:40:14,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:40:14,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:40:14,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:14,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,006 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-11-23 13:40:15,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:40:15,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:40:15,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:40:15,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:40:15,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:40:15,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:40:15,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:40:15,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:40:15,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (1/1) ... [2021-11-23 13:40:15,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:40:15,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:15,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:40:15,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:40:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:40:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:40:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:40:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:40:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:40:15,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:40:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:40:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:40:15,248 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:40:15,250 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:40:15,499 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:40:15,506 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:40:15,507 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 13:40:15,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:15 BoogieIcfgContainer [2021-11-23 13:40:15,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:40:15,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:40:15,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:40:15,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:40:15,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:40:14" (1/3) ... [2021-11-23 13:40:15,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ed5b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:15, skipping insertion in model container [2021-11-23 13:40:15,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:14" (2/3) ... [2021-11-23 13:40:15,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ed5b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:15, skipping insertion in model container [2021-11-23 13:40:15,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:15" (3/3) ... [2021-11-23 13:40:15,540 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2021-11-23 13:40:15,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:40:15,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:40:15,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:40:15,655 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:40:15,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:40:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2021-11-23 13:40:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:40:15,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:15,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:15,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2021-11-23 13:40:15,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:15,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157633667] [2021-11-23 13:40:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:15,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:15,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157633667] [2021-11-23 13:40:15,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157633667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:15,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:15,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:40:15,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514236746] [2021-11-23 13:40:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:15,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:16,000 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 13:40:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:16,120 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2021-11-23 13:40:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-11-23 13:40:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:16,133 INFO L225 Difference]: With dead ends: 50 [2021-11-23 13:40:16,133 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:40:16,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:16,142 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:16,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:40:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:40:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-23 13:40:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2021-11-23 13:40:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-23 13:40:16,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-11-23 13:40:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-23 13:40:16,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 13:40:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-23 13:40:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:40:16,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:16,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:16,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:40:16,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2021-11-23 13:40:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719293914] [2021-11-23 13:40:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:16,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:40:16,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719293914] [2021-11-23 13:40:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719293914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061674479] [2021-11-23 13:40:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:16,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:16,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:16,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:16,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:40:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:40:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:40:16,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:40:16,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061674479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:16,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:16,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:40:16,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673423204] [2021-11-23 13:40:16,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:40:16,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:40:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:40:16,601 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-11-23 13:40:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:16,781 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2021-11-23 13:40:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:40:16,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) Word has length 19 [2021-11-23 13:40:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:16,797 INFO L225 Difference]: With dead ends: 63 [2021-11-23 13:40:16,797 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 13:40:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:40:16,800 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:16,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:40:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 13:40:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 13:40:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 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) [2021-11-23 13:40:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-11-23 13:40:16,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2021-11-23 13:40:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:16,820 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-11-23 13:40:16,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-11-23 13:40:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-11-23 13:40:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:40:16,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:16,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:16,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:17,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:17,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1011418317, now seen corresponding path program 2 times [2021-11-23 13:40:17,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438585231] [2021-11-23 13:40:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:17,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 13:40:17,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438585231] [2021-11-23 13:40:17,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438585231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:17,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:17,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:40:17,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988104888] [2021-11-23 13:40:17,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:17,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:40:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:40:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:40:17,272 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-11-23 13:40:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:17,362 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2021-11-23 13:40:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:40:17,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) Word has length 43 [2021-11-23 13:40:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:17,365 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:40:17,365 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 13:40:17,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:40:17,368 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:17,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:40:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 13:40:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 13:40:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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) [2021-11-23 13:40:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-23 13:40:17,393 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 43 [2021-11-23 13:40:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-23 13:40:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-11-23 13:40:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-23 13:40:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:40:17,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:17,400 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:40:17,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 9650037, now seen corresponding path program 1 times [2021-11-23 13:40:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:17,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161549878] [2021-11-23 13:40:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:17,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 13:40:17,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161549878] [2021-11-23 13:40:17,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161549878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787415964] [2021-11-23 13:40:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:17,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:17,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:17,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:40:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:40:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 13:40:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 13:40:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787415964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:18,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:18,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-11-23 13:40:18,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916958576] [2021-11-23 13:40:18,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:18,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:40:18,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:40:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:40:18,032 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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) [2021-11-23 13:40:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:18,510 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2021-11-23 13:40:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:40:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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) Word has length 43 [2021-11-23 13:40:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:18,522 INFO L225 Difference]: With dead ends: 145 [2021-11-23 13:40:18,522 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 13:40:18,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:40:18,529 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:18,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 63 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:40:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 13:40:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-23 13:40:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.238532110091743) internal successors, (135), 109 states have internal predecessors, (135), 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) [2021-11-23 13:40:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2021-11-23 13:40:18,566 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 43 [2021-11-23 13:40:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:18,567 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2021-11-23 13:40:18,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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) [2021-11-23 13:40:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2021-11-23 13:40:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 13:40:18,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:18,575 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:18,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:18,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:18,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 762574501, now seen corresponding path program 2 times [2021-11-23 13:40:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120476895] [2021-11-23 13:40:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-23 13:40:19,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:19,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120476895] [2021-11-23 13:40:19,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120476895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:19,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208079580] [2021-11-23 13:40:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:40:19,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:19,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:19,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:40:19,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:40:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:40:19,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-23 13:40:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-23 13:40:19,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208079580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:19,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:19,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-11-23 13:40:19,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89038214] [2021-11-23 13:40:19,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:19,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 13:40:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 13:40:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:40:19,869 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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) [2021-11-23 13:40:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:20,424 INFO L93 Difference]: Finished difference Result 895 states and 1184 transitions. [2021-11-23 13:40:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:40:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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) Word has length 107 [2021-11-23 13:40:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:20,430 INFO L225 Difference]: With dead ends: 895 [2021-11-23 13:40:20,431 INFO L226 Difference]: Without dead ends: 812 [2021-11-23 13:40:20,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:40:20,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 446 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:20,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 54 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:40:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-23 13:40:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 222. [2021-11-23 13:40:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.244343891402715) internal successors, (275), 221 states have internal predecessors, (275), 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) [2021-11-23 13:40:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2021-11-23 13:40:20,467 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 107 [2021-11-23 13:40:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:20,467 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2021-11-23 13:40:20,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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) [2021-11-23 13:40:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2021-11-23 13:40:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-23 13:40:20,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:20,471 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:20,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:20,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:20,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash 518233129, now seen corresponding path program 3 times [2021-11-23 13:40:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:20,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732906019] [2021-11-23 13:40:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:20,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2021-11-23 13:40:21,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:21,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732906019] [2021-11-23 13:40:21,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732906019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155831167] [2021-11-23 13:40:21,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:40:21,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:21,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:21,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:40:22,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 13:40:22,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:40:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2021-11-23 13:40:22,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2021-11-23 13:40:23,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155831167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:23,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 35 [2021-11-23 13:40:23,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013253831] [2021-11-23 13:40:23,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 13:40:23,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 13:40:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=709, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 13:40:23,201 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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) [2021-11-23 13:40:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:24,530 INFO L93 Difference]: Finished difference Result 470 states and 602 transitions. [2021-11-23 13:40:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:40:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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) Word has length 219 [2021-11-23 13:40:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:24,533 INFO L225 Difference]: With dead ends: 470 [2021-11-23 13:40:24,533 INFO L226 Difference]: Without dead ends: 303 [2021-11-23 13:40:24,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1434, Invalid=2472, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 13:40:24,537 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 656 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:24,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 76 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:40:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-23 13:40:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 278. [2021-11-23 13:40:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.0722021660649819) internal successors, (297), 277 states have internal predecessors, (297), 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) [2021-11-23 13:40:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 297 transitions. [2021-11-23 13:40:24,565 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 297 transitions. Word has length 219 [2021-11-23 13:40:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 297 transitions. [2021-11-23 13:40:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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) [2021-11-23 13:40:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 297 transitions. [2021-11-23 13:40:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-23 13:40:24,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:24,570 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:24,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:24,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:24,790 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash 87947340, now seen corresponding path program 1 times [2021-11-23 13:40:24,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:24,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438601590] [2021-11-23 13:40:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:24,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2021-11-23 13:40:25,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438601590] [2021-11-23 13:40:25,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438601590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353768094] [2021-11-23 13:40:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:25,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:25,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:25,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:40:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 13:40:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2021-11-23 13:40:26,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2021-11-23 13:40:27,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353768094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:27,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:27,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2021-11-23 13:40:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203781710] [2021-11-23 13:40:27,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:27,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 13:40:27,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 13:40:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 13:40:27,501 INFO L87 Difference]: Start difference. First operand 278 states and 297 transitions. Second operand has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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) [2021-11-23 13:40:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:28,861 INFO L93 Difference]: Finished difference Result 1511 states and 1913 transitions. [2021-11-23 13:40:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-23 13:40:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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) Word has length 227 [2021-11-23 13:40:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:28,872 INFO L225 Difference]: With dead ends: 1511 [2021-11-23 13:40:28,872 INFO L226 Difference]: Without dead ends: 1290 [2021-11-23 13:40:28,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 13:40:28,878 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 922 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:28,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 62 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:40:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-11-23 13:40:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 462. [2021-11-23 13:40:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.1258134490238612) internal successors, (519), 461 states have internal predecessors, (519), 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) [2021-11-23 13:40:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 519 transitions. [2021-11-23 13:40:28,932 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 519 transitions. Word has length 227 [2021-11-23 13:40:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:28,933 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 519 transitions. [2021-11-23 13:40:28,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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) [2021-11-23 13:40:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 519 transitions. [2021-11-23 13:40:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-23 13:40:28,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:28,945 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:28,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:29,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:29,160 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash 533193997, now seen corresponding path program 4 times [2021-11-23 13:40:29,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:29,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735871618] [2021-11-23 13:40:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2021-11-23 13:40:31,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:31,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735871618] [2021-11-23 13:40:31,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735871618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:31,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508286327] [2021-11-23 13:40:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:40:31,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:31,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:31,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:40:31,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:40:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:40:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 10038 trivial. 0 not checked. [2021-11-23 13:40:32,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:40:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508286327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:32,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:40:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [59] total 61 [2021-11-23 13:40:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249426483] [2021-11-23 13:40:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:40:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:40:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:40:32,291 INFO L87 Difference]: Start difference. First operand 462 states and 519 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-23 13:40:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:32,376 INFO L93 Difference]: Finished difference Result 924 states and 1089 transitions. [2021-11-23 13:40:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:40:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) Word has length 459 [2021-11-23 13:40:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:32,383 INFO L225 Difference]: With dead ends: 924 [2021-11-23 13:40:32,383 INFO L226 Difference]: Without dead ends: 670 [2021-11-23 13:40:32,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:40:32,387 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:32,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 32 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:40:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-23 13:40:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 622. [2021-11-23 13:40:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.0966183574879227) internal successors, (681), 621 states have internal predecessors, (681), 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) [2021-11-23 13:40:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 681 transitions. [2021-11-23 13:40:32,450 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 681 transitions. Word has length 459 [2021-11-23 13:40:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 681 transitions. [2021-11-23 13:40:32,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-11-23 13:40:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 681 transitions. [2021-11-23 13:40:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-23 13:40:32,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:32,464 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:32,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:32,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:40:32,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1635541619, now seen corresponding path program 5 times [2021-11-23 13:40:32,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:32,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159952240] [2021-11-23 13:40:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:32,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2021-11-23 13:40:34,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159952240] [2021-11-23 13:40:34,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159952240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116909998] [2021-11-23 13:40:34,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:40:34,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:34,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:34,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ce38f1-2f07-4db4-923b-8544c5e611b7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process