./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3 --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 c1aec226fa808ce4648112e4b44dc4f177929414 ................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:19:36,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:19:36,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:19:36,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:19:36,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:19:36,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:19:36,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:19:36,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:19:36,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:19:36,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:19:36,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:19:36,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:19:36,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:19:36,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:19:36,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:19:36,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:19:36,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:19:36,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:19:36,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:19:36,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:19:36,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:19:36,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:19:36,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:19:36,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:19:36,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:19:36,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:19:36,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:19:36,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:19:36,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:19:36,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:19:36,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:19:36,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:19:36,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:19:36,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:19:36,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:19:36,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:19:36,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:19:36,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:19:36,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:19:36,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:19:36,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:19:36,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:19:36,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:19:36,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:19:36,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:19:36,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:19:36,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:19:36,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:19:36,779 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:19:36,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:19:36,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:19:36,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:19:36,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:19:36,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:19:36,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:19:36,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:19:36,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:19:36,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:19:36,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:19:36,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:19:36,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:19:36,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:19:36,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:19:36,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:19:36,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:19:36,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:19:36,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:19:36,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:19:36,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:19:36,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:19:36,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:19:36,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:19:36,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:19:36,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:19:36,788 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_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1aec226fa808ce4648112e4b44dc4f177929414 [2021-10-15 19:19:37,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:19:37,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:19:37,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:19:37,220 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:19:37,221 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:19:37,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2021-10-15 19:19:37,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/data/b13f5e5c9/07c5b08225884ed79976bb0d1b498f45/FLAGfe8aec558 [2021-10-15 19:19:37,927 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:19:37,928 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2021-10-15 19:19:37,941 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/data/b13f5e5c9/07c5b08225884ed79976bb0d1b498f45/FLAGfe8aec558 [2021-10-15 19:19:38,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/data/b13f5e5c9/07c5b08225884ed79976bb0d1b498f45 [2021-10-15 19:19:38,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:19:38,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:19:38,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:38,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:19:38,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:19:38,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760d8845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38, skipping insertion in model container [2021-10-15 19:19:38,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:19:38,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:19:38,533 WARN L228 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_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/sv-benchmarks/c/loop-acceleration/simple_4-2.c[322,335] [2021-10-15 19:19:38,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:38,568 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:19:38,585 WARN L228 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_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/sv-benchmarks/c/loop-acceleration/simple_4-2.c[322,335] [2021-10-15 19:19:38,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:38,608 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:19:38,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38 WrapperNode [2021-10-15 19:19:38,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:38,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:38,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:19:38,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:19:38,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:38,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:19:38,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:19:38,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:19:38,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:19:38,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:19:38,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:19:38,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:19:38,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (1/1) ... [2021-10-15 19:19:38,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:19:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:38,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:19:38,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:19:38,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:19:38,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:19:38,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:19:38,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:19:39,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:19:39,071 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:19:39,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:39 BoogieIcfgContainer [2021-10-15 19:19:39,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:19:39,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:19:39,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:19:39,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:19:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:19:38" (1/3) ... [2021-10-15 19:19:39,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce51d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:19:39, skipping insertion in model container [2021-10-15 19:19:39,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:38" (2/3) ... [2021-10-15 19:19:39,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce51d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:19:39, skipping insertion in model container [2021-10-15 19:19:39,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:39" (3/3) ... [2021-10-15 19:19:39,089 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2021-10-15 19:19:39,095 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:19:39,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:19:39,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:19:39,181 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, mConcurrency=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 [2021-10-15 19:19:39,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:19:39,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 10 places, 12 transitions, 24 flow [2021-10-15 19:19:39,218 INFO L129 PetriNetUnfolder]: 3/12 cut-off events. [2021-10-15 19:19:39,218 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:39,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 12 events. 3/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:19:39,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 10 places, 12 transitions, 24 flow [2021-10-15 19:19:39,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 8 transitions, 16 flow [2021-10-15 19:19:39,244 INFO L129 PetriNetUnfolder]: 2/7 cut-off events. [2021-10-15 19:19:39,245 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:39,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:39,247 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:19:39,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:19:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-15 19:19:39,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:39,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849629420] [2021-10-15 19:19:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:39,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:39,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:39,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849629420] [2021-10-15 19:19:39,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849629420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:39,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:19:39,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:19:39,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080034649] [2021-10-15 19:19:39,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:19:39,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:19:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:19:39,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 12 [2021-10-15 19:19:39,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 8 transitions, 16 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-15 19:19:39,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:39,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 12 [2021-10-15 19:19:39,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:39,757 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-10-15 19:19:39,758 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:19:39,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 8 events. 1/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:19:39,759 INFO L132 encePairwiseOnDemand]: 8/12 looper letters, 3 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2021-10-15 19:19:39,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 9 places, 8 transitions, 26 flow [2021-10-15 19:19:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:19:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:19:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-10-15 19:19:39,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-10-15 19:19:39,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-10-15 19:19:39,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-10-15 19:19:39,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:39,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-10-15 19:19:39,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-10-15 19:19:39,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:39,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:39,805 INFO L186 Difference]: Start difference. First operand has 7 places, 8 transitions, 16 flow. Second operand 3 states and 26 transitions. [2021-10-15 19:19:39,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 9 places, 8 transitions, 26 flow [2021-10-15 19:19:39,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 8 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:19:39,814 INFO L242 Difference]: Finished difference. Result has 10 places, 8 transitions, 26 flow [2021-10-15 19:19:39,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=10, PETRI_TRANSITIONS=8} [2021-10-15 19:19:39,818 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 3 predicate places. [2021-10-15 19:19:39,819 INFO L470 AbstractCegarLoop]: Abstraction has has 10 places, 8 transitions, 26 flow [2021-10-15 19:19:39,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-15 19:19:39,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:39,821 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:39,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:19:39,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:19:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-10-15 19:19:39,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:39,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545636661] [2021-10-15 19:19:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:39,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:39,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:39,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545636661] [2021-10-15 19:19:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545636661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:39,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455159540] [2021-10-15 19:19:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:39,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:39,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:39,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:19:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:19:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:40,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455159540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:40,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:19:40,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 19:19:40,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032938314] [2021-10-15 19:19:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:19:40,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:19:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:19:40,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 12 [2021-10-15 19:19:40,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 8 transitions, 26 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:40,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 12 [2021-10-15 19:19:40,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:40,270 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2021-10-15 19:19:40,270 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:19:40,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 9 events. 1/9 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 13. Up to 5 conditions per place. [2021-10-15 19:19:40,272 INFO L132 encePairwiseOnDemand]: 9/12 looper letters, 3 selfloop transitions, 3 changer transitions 0/9 dead transitions. [2021-10-15 19:19:40,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 9 transitions, 42 flow [2021-10-15 19:19:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:19:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:19:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 31 transitions. [2021-10-15 19:19:40,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2021-10-15 19:19:40,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 31 transitions. [2021-10-15 19:19:40,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 31 transitions. [2021-10-15 19:19:40,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:40,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 31 transitions. [2021-10-15 19:19:40,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,302 INFO L186 Difference]: Start difference. First operand has 10 places, 8 transitions, 26 flow. Second operand 4 states and 31 transitions. [2021-10-15 19:19:40,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 9 transitions, 42 flow [2021-10-15 19:19:40,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 9 transitions, 38 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:19:40,305 INFO L242 Difference]: Finished difference. Result has 13 places, 9 transitions, 38 flow [2021-10-15 19:19:40,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=38, PETRI_PLACES=13, PETRI_TRANSITIONS=9} [2021-10-15 19:19:40,306 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 6 predicate places. [2021-10-15 19:19:40,306 INFO L470 AbstractCegarLoop]: Abstraction has has 13 places, 9 transitions, 38 flow [2021-10-15 19:19:40,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,307 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:19:40,307 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:19:40,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:40,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:40,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:19:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-10-15 19:19:40,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:40,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370580982] [2021-10-15 19:19:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:40,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:19:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:19:40,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:19:40,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370580982] [2021-10-15 19:19:40,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370580982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:19:40,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974264434] [2021-10-15 19:19:40,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:19:40,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:19:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:40,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:19:40,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:19:40,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:19:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:19:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:19:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:19:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:19:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974264434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:19:40,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:19:40,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-15 19:19:40,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939705760] [2021-10-15 19:19:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:19:40,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:19:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:19:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:19:40,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 12 [2021-10-15 19:19:40,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 9 transitions, 38 flow. 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) [2021-10-15 19:19:40,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:19:40,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 12 [2021-10-15 19:19:40,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:19:40,949 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-10-15 19:19:40,949 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:19:40,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 7 events. 1/7 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 10. Up to 5 conditions per place. [2021-10-15 19:19:40,951 INFO L132 encePairwiseOnDemand]: 9/12 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-10-15 19:19:40,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 7 transitions, 46 flow [2021-10-15 19:19:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:19:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:19:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2021-10-15 19:19:40,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4375 [2021-10-15 19:19:40,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 21 transitions. [2021-10-15 19:19:40,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 21 transitions. [2021-10-15 19:19:40,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:19:40,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 21 transitions. [2021-10-15 19:19:40,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2021-10-15 19:19:40,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:40,967 INFO L186 Difference]: Start difference. First operand has 13 places, 9 transitions, 38 flow. Second operand 4 states and 21 transitions. [2021-10-15 19:19:40,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 7 transitions, 46 flow [2021-10-15 19:19:40,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 38 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:19:40,970 INFO L242 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2021-10-15 19:19:40,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2021-10-15 19:19:40,970 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 5 predicate places. [2021-10-15 19:19:40,971 INFO L470 AbstractCegarLoop]: Abstraction has has 12 places, 0 transitions, 0 flow [2021-10-15 19:19:40,975 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) [2021-10-15 19:19:40,982 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:19:41,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:19:41,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-15 19:19:41,214 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:19:41,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:19:41 BoogieIcfgContainer [2021-10-15 19:19:41,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:19:41,219 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:19:41,219 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:19:41,219 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:19:41,220 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:39" (3/4) ... [2021-10-15 19:19:41,224 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:19:41,237 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:19:41,237 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:19:41,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:19:41,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:19:41,273 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:19:41,273 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:19:41,275 INFO L168 Benchmark]: Toolchain (without parser) took 2987.64 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 63.7 MB in the beginning and 84.9 MB in the end (delta: -21.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:41,276 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 104.9 MB. Free memory was 79.7 MB in the beginning and 79.6 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:41,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.82 ms. Allocated memory is still 104.9 MB. Free memory was 63.5 MB in the beginning and 79.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:41,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.42 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:41,278 INFO L168 Benchmark]: Boogie Preprocessor took 37.87 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.5 MB in the end (delta: 988.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:41,278 INFO L168 Benchmark]: RCFGBuilder took 382.87 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 68.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:41,279 INFO L168 Benchmark]: TraceAbstraction took 2139.51 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.0 MB in the beginning and 87.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:41,280 INFO L168 Benchmark]: Witness Printer took 54.50 ms. Allocated memory is still 125.8 MB. Free memory was 87.2 MB in the beginning and 84.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:41,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 104.9 MB. Free memory was 79.7 MB in the beginning and 79.6 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.82 ms. Allocated memory is still 104.9 MB. Free memory was 63.5 MB in the beginning and 79.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.42 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.87 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.5 MB in the end (delta: 988.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 382.87 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 68.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2139.51 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.0 MB in the beginning and 87.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * Witness Printer took 54.50 ms. Allocated memory is still 125.8 MB. Free memory was 87.2 MB in the beginning and 84.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2050.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 262.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=2, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.3ms SsaConstructionTime, 154.7ms SatisfiabilityAnalysisTime, 755.4ms InterpolantComputationTime, 36 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 3 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:19:41,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e3ab6a2-5a87-408b-a0a4-fddbbd2329c1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...