./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3f.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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/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 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:07:43,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:07:43,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:07:43,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:07:43,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:07:43,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:07:43,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:07:43,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:07:43,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:07:43,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:07:43,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:07:43,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:07:43,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:07:43,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:07:43,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:07:43,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:07:43,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:07:43,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:07:43,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:07:43,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:07:43,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:07:43,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:07:43,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:07:43,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:07:43,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:07:43,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:07:43,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:07:43,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:07:43,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:07:43,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:07:43,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:07:43,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:07:43,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:07:43,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:07:43,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:07:43,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:07:43,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:07:43,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:07:43,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:07:43,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:07:43,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:07:43,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:07:43,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:07:43,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:07:43,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:07:43,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:07:43,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:07:43,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:07:43,871 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:07:43,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:07:43,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:07:43,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:07:43,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:07:43,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:07:43,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:07:43,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:07:43,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:07:43,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:07:43,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:07:43,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:07:43,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:07:43,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:07:43,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:07:43,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:07:43,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:07:43,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:07:43,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:07:43,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:07:43,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:07:43,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:07:43,877 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:07:43,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:07:43,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:07:43,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:07:43,878 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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 [2021-10-15 19:07:44,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:07:44,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:07:44,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:07:44,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:07:44,267 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:07:44,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-fpi/brs3f.c [2021-10-15 19:07:44,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/data/4afee0487/8d52489119ec4590a7ded72dec4e31ff/FLAGfe9446114 [2021-10-15 19:07:45,011 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:07:45,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/sv-benchmarks/c/array-fpi/brs3f.c [2021-10-15 19:07:45,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/data/4afee0487/8d52489119ec4590a7ded72dec4e31ff/FLAGfe9446114 [2021-10-15 19:07:45,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/data/4afee0487/8d52489119ec4590a7ded72dec4e31ff [2021-10-15 19:07:45,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:07:45,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:07:45,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:07:45,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:07:45,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:07:45,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7864b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45, skipping insertion in model container [2021-10-15 19:07:45,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:07:45,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:07:45,664 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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2021-10-15 19:07:45,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:07:45,706 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:07:45,721 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_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2021-10-15 19:07:45,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:07:45,764 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:07:45,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45 WrapperNode [2021-10-15 19:07:45,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:07:45,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:07:45,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:07:45,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:07:45,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:07:45,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:07:45,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:07:45,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:07:45,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:07:45,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:07:45,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:07:45,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:07:45,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (1/1) ... [2021-10-15 19:07:45,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:07:45,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:45,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:07:45,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:07:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:07:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:07:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:07:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:07:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:07:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:07:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:07:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:07:46,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:07:46,403 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-15 19:07:46,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:46 BoogieIcfgContainer [2021-10-15 19:07:46,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:07:46,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:07:46,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:07:46,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:07:46,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:07:45" (1/3) ... [2021-10-15 19:07:46,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88f671d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:07:46, skipping insertion in model container [2021-10-15 19:07:46,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:07:45" (2/3) ... [2021-10-15 19:07:46,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88f671d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:07:46, skipping insertion in model container [2021-10-15 19:07:46,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:46" (3/3) ... [2021-10-15 19:07:46,419 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2021-10-15 19:07:46,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:07:46,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:07:46,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:07:46,502 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 19:07:46,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:07:46,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 28 transitions, 56 flow [2021-10-15 19:07:46,537 INFO L129 PetriNetUnfolder]: 9/28 cut-off events. [2021-10-15 19:07:46,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:46,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 28 events. 9/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:07:46,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 28 transitions, 56 flow [2021-10-15 19:07:46,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 22 transitions, 44 flow [2021-10-15 19:07:46,549 INFO L129 PetriNetUnfolder]: 7/21 cut-off events. [2021-10-15 19:07:46,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:46,550 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:46,551 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:46,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-10-15 19:07:46,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:46,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761115484] [2021-10-15 19:07:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:46,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:46,799 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 19:07:46,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:46,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761115484] [2021-10-15 19:07:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761115484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:46,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:07:46,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558434807] [2021-10-15 19:07:46,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:07:46,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:07:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:07:46,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2021-10-15 19:07:46,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 22 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 19:07:46,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:46,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2021-10-15 19:07:46,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:46,942 INFO L129 PetriNetUnfolder]: 4/25 cut-off events. [2021-10-15 19:07:46,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:07:46,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 25 events. 4/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-10-15 19:07:46,946 INFO L132 encePairwiseOnDemand]: 15/28 looper letters, 16 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2021-10-15 19:07:46,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 25 transitions, 94 flow [2021-10-15 19:07:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:07:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:07:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2021-10-15 19:07:46,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2021-10-15 19:07:46,964 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 59 transitions. [2021-10-15 19:07:46,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 59 transitions. [2021-10-15 19:07:46,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:46,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 59 transitions. [2021-10-15 19:07:46,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 19:07:46,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 19:07:46,981 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 19:07:46,983 INFO L186 Difference]: Start difference. First operand has 16 places, 22 transitions, 44 flow. Second operand 4 states and 59 transitions. [2021-10-15 19:07:46,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 25 transitions, 94 flow [2021-10-15 19:07:46,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 94 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:07:46,990 INFO L242 Difference]: Finished difference. Result has 21 places, 22 transitions, 81 flow [2021-10-15 19:07:46,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2021-10-15 19:07:46,994 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 5 predicate places. [2021-10-15 19:07:46,995 INFO L470 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 81 flow [2021-10-15 19:07:46,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 19:07:46,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:46,997 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:46,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:07:46,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-10-15 19:07:46,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:46,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486374592] [2021-10-15 19:07:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:47,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:07:47,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:47,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486374592] [2021-10-15 19:07:47,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486374592] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:47,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:47,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:07:47,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121077457] [2021-10-15 19:07:47,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:07:47,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:47,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:07:47,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:07:47,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2021-10-15 19:07:47,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 19:07:47,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:47,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2021-10-15 19:07:47,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:47,307 INFO L129 PetriNetUnfolder]: 5/30 cut-off events. [2021-10-15 19:07:47,307 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 19:07:47,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 30 events. 5/30 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 25. Up to 15 conditions per place. [2021-10-15 19:07:47,309 INFO L132 encePairwiseOnDemand]: 23/28 looper letters, 14 selfloop transitions, 4 changer transitions 2/27 dead transitions. [2021-10-15 19:07:47,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 139 flow [2021-10-15 19:07:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:07:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:07:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2021-10-15 19:07:47,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2021-10-15 19:07:47,316 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 55 transitions. [2021-10-15 19:07:47,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 55 transitions. [2021-10-15 19:07:47,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:47,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 55 transitions. [2021-10-15 19:07:47,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 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) [2021-10-15 19:07:47,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 19:07:47,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 19:07:47,320 INFO L186 Difference]: Start difference. First operand has 21 places, 22 transitions, 81 flow. Second operand 5 states and 55 transitions. [2021-10-15 19:07:47,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 139 flow [2021-10-15 19:07:47,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:07:47,324 INFO L242 Difference]: Finished difference. Result has 27 places, 24 transitions, 113 flow [2021-10-15 19:07:47,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2021-10-15 19:07:47,324 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 11 predicate places. [2021-10-15 19:07:47,325 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 113 flow [2021-10-15 19:07:47,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 19:07:47,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:47,325 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:47,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:07:47,326 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-10-15 19:07:47,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:47,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128964177] [2021-10-15 19:07:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:47,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:47,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:47,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128964177] [2021-10-15 19:07:47,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128964177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:47,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63893435] [2021-10-15 19:07:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:47,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:07:47,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:07:47,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:07:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:07:47,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:07:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:07:47,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63893435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:07:47,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:07:47,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-15 19:07:47,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636494094] [2021-10-15 19:07:47,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:07:47,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:07:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:07:47,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2021-10-15 19:07:47,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 113 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 19:07:47,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:47,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2021-10-15 19:07:47,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:47,970 INFO L129 PetriNetUnfolder]: 6/41 cut-off events. [2021-10-15 19:07:47,970 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-10-15 19:07:47,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 41 events. 6/41 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 122. Up to 18 conditions per place. [2021-10-15 19:07:47,971 INFO L132 encePairwiseOnDemand]: 17/28 looper letters, 17 selfloop transitions, 14 changer transitions 7/41 dead transitions. [2021-10-15 19:07:47,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 251 flow [2021-10-15 19:07:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:07:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:07:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2021-10-15 19:07:47,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2021-10-15 19:07:47,975 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 109 transitions. [2021-10-15 19:07:47,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 109 transitions. [2021-10-15 19:07:47,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:47,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 109 transitions. [2021-10-15 19:07:47,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 19:07:47,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 19:07:47,988 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 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 19:07:47,988 INFO L186 Difference]: Start difference. First operand has 27 places, 24 transitions, 113 flow. Second operand 10 states and 109 transitions. [2021-10-15 19:07:47,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 251 flow [2021-10-15 19:07:47,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:47,993 INFO L242 Difference]: Finished difference. Result has 35 places, 28 transitions, 167 flow [2021-10-15 19:07:47,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=167, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2021-10-15 19:07:47,994 INFO L334 CegarLoopForPetriNet]: 16 programPoint places, 19 predicate places. [2021-10-15 19:07:47,994 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 167 flow [2021-10-15 19:07:47,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 19:07:47,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:47,995 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:07:48,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:07:48,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:07:48,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:48,215 INFO L82 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-10-15 19:07:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:48,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893331775] [2021-10-15 19:07:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:48,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:07:48,265 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:07:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:07:48,370 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:07:48,376 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:07:48,378 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:07:48,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:07:48,390 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:07:48,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:07:48 BoogieIcfgContainer [2021-10-15 19:07:48,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:07:48,459 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:07:48,459 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:07:48,459 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:07:48,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:07:46" (3/4) ... [2021-10-15 19:07:48,464 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:07:48,554 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90bad7b9-0e20-471a-8f06-e76cd2eb3c29/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:07:48,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:07:48,561 INFO L168 Benchmark]: Toolchain (without parser) took 3189.46 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.9 MB in the beginning and 78.7 MB in the end (delta: -28.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:07:48,562 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:07:48,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.58 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 80.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:48,571 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.86 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:07:48,573 INFO L168 Benchmark]: Boogie Preprocessor took 56.11 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 77.7 MB in the end (delta: 895.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:48,574 INFO L168 Benchmark]: RCFGBuilder took 521.09 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 66.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:48,574 INFO L168 Benchmark]: TraceAbstraction took 2047.75 ms. Allocated memory is still 104.9 MB. Free memory was 66.5 MB in the beginning and 81.4 MB in the end (delta: -14.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:48,575 INFO L168 Benchmark]: Witness Printer took 100.73 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 78.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:07:48,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 393.58 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 80.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.86 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 79.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.11 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 77.7 MB in the end (delta: 895.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 521.09 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 66.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2047.75 ms. Allocated memory is still 104.9 MB. Free memory was 66.5 MB in the beginning and 81.4 MB in the end (delta: -14.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 100.73 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 78.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i