./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-1.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_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/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_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/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_1c13f139-193c-418c-a9d9-7d3a941d12d9/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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/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_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................................................................................. 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 20:22:03,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:22:03,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:22:03,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:22:03,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:22:03,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:22:03,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:22:03,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:22:03,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:22:03,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:22:03,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:22:03,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:22:03,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:22:03,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:22:03,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:22:03,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:22:03,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:22:03,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:22:03,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:22:03,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:22:03,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:22:03,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:22:03,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:22:03,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:22:03,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:22:03,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:22:03,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:22:03,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:22:03,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:22:03,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:22:03,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:22:03,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:22:03,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:22:03,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:22:03,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:22:03,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:22:03,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:22:03,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:22:03,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:22:03,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:22:03,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:22:03,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:22:04,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:22:04,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:22:04,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:22:04,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:22:04,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:22:04,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:22:04,030 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:22:04,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:22:04,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:22:04,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:22:04,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:22:04,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:22:04,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:22:04,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:22:04,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:22:04,032 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:22:04,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:22:04,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:22:04,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:22:04,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:22:04,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:22:04,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:22:04,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:04,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:22:04,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:22:04,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:22:04,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:22:04,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:22:04,035 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:22:04,037 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:22:04,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:22:04,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:22:04,038 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-15 20:22:04,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:22:04,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:22:04,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:22:04,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:22:04,322 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:22:04,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-15 20:22:04,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/a7dac79bc/e4cb3c88734d4b618fc44eae550107ca/FLAG68ad3eb1b [2021-10-15 20:22:04,932 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:22:04,933 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-15 20:22:04,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/a7dac79bc/e4cb3c88734d4b618fc44eae550107ca/FLAG68ad3eb1b [2021-10-15 20:22:05,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/a7dac79bc/e4cb3c88734d4b618fc44eae550107ca [2021-10-15 20:22:05,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:22:05,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:22:05,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:05,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:22:05,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:22:05,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd67f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05, skipping insertion in model container [2021-10-15 20:22:05,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:22:05,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:22:05,524 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-15 20:22:05,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:05,557 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:22:05,572 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-15 20:22:05,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:05,590 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:22:05,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05 WrapperNode [2021-10-15 20:22:05,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:05,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:05,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:22:05,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:22:05,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:05,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:22:05,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:22:05,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:22:05,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:22:05,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:22:05,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:22:05,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:22:05,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (1/1) ... [2021-10-15 20:22:05,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:05,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:05,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:22:05,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:22:05,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:22:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:22:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:22:05,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:22:05,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:22:05,975 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 20:22:05,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:05 BoogieIcfgContainer [2021-10-15 20:22:05,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:22:05,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:22:05,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:22:05,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:22:05,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:22:05" (1/3) ... [2021-10-15 20:22:05,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a1f291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:05, skipping insertion in model container [2021-10-15 20:22:05,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:05" (2/3) ... [2021-10-15 20:22:05,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a1f291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:05, skipping insertion in model container [2021-10-15 20:22:05,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:05" (3/3) ... [2021-10-15 20:22:05,986 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-15 20:22:05,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:22:05,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:22:06,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:22:06,067 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 20:22:06,067 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:22:06,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:22:06,101 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 20:22:06,102 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:06,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:22:06,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:22:06,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 7 transitions, 14 flow [2021-10-15 20:22:06,112 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-10-15 20:22:06,112 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:06,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:06,113 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:22:06,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:06,130 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-15 20:22:06,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:06,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441774962] [2021-10-15 20:22:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:06,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:06,342 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 20:22:06,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:06,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441774962] [2021-10-15 20:22:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441774962] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:22:06,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:22:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:22:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368892063] [2021-10-15 20:22:06,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:22:06,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:22:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:22:06,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 14 [2021-10-15 20:22:06,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 7 transitions, 14 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:06,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:06,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 14 [2021-10-15 20:22:06,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:06,397 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-10-15 20:22:06,398 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:06,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-10-15 20:22:06,399 INFO L132 encePairwiseOnDemand]: 13/14 looper letters, 0 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2021-10-15 20:22:06,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:22:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:22:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 25 transitions. [2021-10-15 20:22:06,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-10-15 20:22:06,411 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 25 transitions. [2021-10-15 20:22:06,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 25 transitions. [2021-10-15 20:22:06,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:06,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 25 transitions. [2021-10-15 20:22:06,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:06,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:22:06,420 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:22:06,422 INFO L186 Difference]: Start difference. First operand has 7 places, 7 transitions, 14 flow. Second operand 2 states and 25 transitions. [2021-10-15 20:22:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:06,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 8 places, 6 transitions, 12 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:22:06,426 INFO L242 Difference]: Finished difference. Result has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:06,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=12, PETRI_PLACES=8, PETRI_TRANSITIONS=6} [2021-10-15 20:22:06,429 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 1 predicate places. [2021-10-15 20:22:06,429 INFO L470 AbstractCegarLoop]: Abstraction has has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:06,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:06,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:06,430 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:22:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:22:06,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-15 20:22:06,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:06,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66187592] [2021-10-15 20:22:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:06,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:22:06,455 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:22:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:22:06,506 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:22:06,506 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:22:06,508 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:22:06,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:22:06,515 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:22:06,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:22:06 BoogieIcfgContainer [2021-10-15 20:22:06,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:22:06,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:22:06,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:22:06,531 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:22:06,532 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:05" (3/4) ... [2021-10-15 20:22:06,535 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:22:06,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:22:06,537 INFO L168 Benchmark]: Toolchain (without parser) took 1218.25 ms. Allocated memory is still 125.8 MB. Free memory was 92.3 MB in the beginning and 69.4 MB in the end (delta: 22.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:06,538 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 58.4 MB in the beginning and 58.3 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:06,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.99 ms. Allocated memory is still 125.8 MB. Free memory was 92.3 MB in the beginning and 103.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:06,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.50 ms. Allocated memory is still 125.8 MB. Free memory was 103.7 MB in the beginning and 102.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:06,541 INFO L168 Benchmark]: Boogie Preprocessor took 34.44 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 101.5 MB in the end (delta: 942.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:06,541 INFO L168 Benchmark]: RCFGBuilder took 311.70 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:06,542 INFO L168 Benchmark]: TraceAbstraction took 551.23 ms. Allocated memory is still 125.8 MB. Free memory was 91.6 MB in the beginning and 69.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:06,543 INFO L168 Benchmark]: Witness Printer took 4.25 ms. Allocated memory is still 125.8 MB. Free memory was 69.7 MB in the beginning and 69.4 MB in the end (delta: 304.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:06,547 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 86.0 MB. Free memory was 58.4 MB in the beginning and 58.3 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.99 ms. Allocated memory is still 125.8 MB. Free memory was 92.3 MB in the beginning and 103.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.50 ms. Allocated memory is still 125.8 MB. Free memory was 103.7 MB in the beginning and 102.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.44 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 101.5 MB in the end (delta: 942.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 311.70 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 551.23 ms. Allocated memory is still 125.8 MB. Free memory was 91.6 MB in the beginning and 69.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.25 ms. Allocated memory is still 125.8 MB. Free memory was 69.7 MB in the beginning and 69.4 MB in the end (delta: 304.3 kB). There was no memory consumed. 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 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 461.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 46.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 0 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 2, 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: 16.8ms SsaConstructionTime, 52.9ms SatisfiabilityAnalysisTime, 79.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 20:22:06,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:22:09,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:22:09,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:22:09,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:22:09,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:22:09,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:22:09,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:22:09,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:22:09,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:22:09,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:22:09,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:22:09,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:22:09,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:22:09,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:22:09,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:22:09,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:22:09,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:22:09,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:22:09,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:22:09,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:22:09,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:22:09,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:22:09,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:22:09,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:22:09,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:22:09,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:22:09,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:22:09,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:22:09,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:22:09,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:22:09,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:22:09,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:22:09,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:22:09,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:22:09,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:22:09,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:22:09,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:22:09,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:22:09,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:22:09,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:22:09,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:22:09,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 20:22:09,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:22:09,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:22:09,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:22:09,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:22:09,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:22:09,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:22:09,185 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:22:09,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:22:09,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:22:09,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:22:09,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:22:09,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:22:09,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:22:09,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:22:09,187 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 20:22:09,187 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 20:22:09,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:22:09,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:22:09,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:22:09,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:22:09,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:22:09,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:22:09,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:22:09,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:09,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:22:09,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:22:09,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:22:09,190 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 20:22:09,190 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 20:22:09,190 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:22:09,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:22:09,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:22:09,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:22:09,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 20:22:09,191 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-15 20:22:09,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:22:09,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:22:09,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:22:09,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:22:09,590 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:22:09,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-15 20:22:09,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/cb7992c57/8b0c462847b14824b70ef31fe8e71984/FLAGddeedd846 [2021-10-15 20:22:10,189 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:22:10,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-15 20:22:10,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/cb7992c57/8b0c462847b14824b70ef31fe8e71984/FLAGddeedd846 [2021-10-15 20:22:10,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/data/cb7992c57/8b0c462847b14824b70ef31fe8e71984 [2021-10-15 20:22:10,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:22:10,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:22:10,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:10,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:22:10,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:22:10,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36dd750e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10, skipping insertion in model container [2021-10-15 20:22:10,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:22:10,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:22:10,802 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-15 20:22:10,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:10,830 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:22:10,851 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_1c13f139-193c-418c-a9d9-7d3a941d12d9/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-15 20:22:10,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:22:10,874 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:22:10,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10 WrapperNode [2021-10-15 20:22:10,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:22:10,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:10,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:22:10,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:22:10,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:22:10,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:22:10,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:22:10,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:22:10,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:10,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:11,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:22:11,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:22:11,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:22:11,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:22:11,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (1/1) ... [2021-10-15 20:22:11,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:22:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:11,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:22:11,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:22:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 20:22:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:22:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:22:11,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:22:12,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:22:12,206 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 20:22:12,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:12 BoogieIcfgContainer [2021-10-15 20:22:12,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:22:12,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:22:12,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:22:12,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:22:12,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:22:10" (1/3) ... [2021-10-15 20:22:12,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7f80fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:12, skipping insertion in model container [2021-10-15 20:22:12,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:22:10" (2/3) ... [2021-10-15 20:22:12,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7f80fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:22:12, skipping insertion in model container [2021-10-15 20:22:12,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:12" (3/3) ... [2021-10-15 20:22:12,216 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-15 20:22:12,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:22:12,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:22:12,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:22:12,277 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 20:22:12,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:22:12,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:22:12,306 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 20:22:12,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:12,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:22:12,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 14 transitions, 28 flow [2021-10-15 20:22:12,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 7 transitions, 14 flow [2021-10-15 20:22:12,313 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-10-15 20:22:12,314 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:12,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:12,314 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:22:12,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-15 20:22:12,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:22:12,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395778065] [2021-10-15 20:22:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:12,333 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:22:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:22:12,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:22:12,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 20:22:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:12,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 20:22:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:12,508 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 20:22:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:22:12,542 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 20:22:12,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:22:12,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395778065] [2021-10-15 20:22:12,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395778065] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:22:12,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:22:12,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:22:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161459076] [2021-10-15 20:22:12,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:22:12,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:22:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:22:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:22:12,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 14 [2021-10-15 20:22:12,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 7 transitions, 14 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:12,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:12,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 14 [2021-10-15 20:22:12,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:12,582 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-10-15 20:22:12,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:22:12,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-10-15 20:22:12,583 INFO L132 encePairwiseOnDemand]: 13/14 looper letters, 0 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2021-10-15 20:22:12,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:22:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:22:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 25 transitions. [2021-10-15 20:22:12,595 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-10-15 20:22:12,596 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 25 transitions. [2021-10-15 20:22:12,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 25 transitions. [2021-10-15 20:22:12,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:12,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 25 transitions. [2021-10-15 20:22:12,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:12,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:22:12,615 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:22:12,617 INFO L186 Difference]: Start difference. First operand has 7 places, 7 transitions, 14 flow. Second operand 2 states and 25 transitions. [2021-10-15 20:22:12,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:12,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 8 places, 6 transitions, 12 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:22:12,620 INFO L242 Difference]: Finished difference. Result has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:12,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=12, PETRI_PLACES=8, PETRI_TRANSITIONS=6} [2021-10-15 20:22:12,623 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 1 predicate places. [2021-10-15 20:22:12,624 INFO L470 AbstractCegarLoop]: Abstraction has has 8 places, 6 transitions, 12 flow [2021-10-15 20:22:12,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 20:22:12,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:12,624 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:22:12,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:12,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:22:12,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-15 20:22:12,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:22:12,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499610852] [2021-10-15 20:22:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:12,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:22:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:22:12,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:22:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 20:22:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:22:12,978 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:22:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:22:13,083 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 20:22:13,083 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:22:13,085 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:22:13,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:22:13,292 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:22:13,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:22:13 BoogieIcfgContainer [2021-10-15 20:22:13,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:22:13,310 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:22:13,310 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:22:13,311 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:22:13,311 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:22:12" (3/4) ... [2021-10-15 20:22:13,313 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:22:13,357 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:22:13,358 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:22:13,360 INFO L168 Benchmark]: Toolchain (without parser) took 2758.19 ms. Allocated memory is still 77.6 MB. Free memory was 61.2 MB in the beginning and 51.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:13,367 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory was 58.8 MB in the beginning and 58.7 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:13,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 77.6 MB. Free memory was 61.0 MB in the beginning and 51.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:13,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 77.6 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:13,369 INFO L168 Benchmark]: Boogie Preprocessor took 89.31 ms. Allocated memory is still 77.6 MB. Free memory was 49.5 MB in the beginning and 60.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:13,370 INFO L168 Benchmark]: RCFGBuilder took 1201.47 ms. Allocated memory is still 77.6 MB. Free memory was 60.1 MB in the beginning and 50.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:22:13,370 INFO L168 Benchmark]: TraceAbstraction took 1100.16 ms. Allocated memory is still 77.6 MB. Free memory was 50.2 MB in the beginning and 53.1 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:13,375 INFO L168 Benchmark]: Witness Printer took 47.62 ms. Allocated memory is still 77.6 MB. Free memory was 52.7 MB in the beginning and 51.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:22:13,378 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 77.6 MB. Free memory was 58.8 MB in the beginning and 58.7 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 77.6 MB. Free memory was 61.0 MB in the beginning and 51.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 77.6 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 89.31 ms. Allocated memory is still 77.6 MB. Free memory was 49.5 MB in the beginning and 60.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1201.47 ms. Allocated memory is still 77.6 MB. Free memory was 60.1 MB in the beginning and 50.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1100.16 ms. Allocated memory is still 77.6 MB. Free memory was 50.2 MB in the beginning and 53.1 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 47.62 ms. Allocated memory is still 77.6 MB. Free memory was 52.7 MB in the beginning and 51.3 MB in the end (delta: 1.4 MB). There was no memory consumed. 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1024.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 57.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 0 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 2, 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: 21.8ms SsaConstructionTime, 156.3ms SatisfiabilityAnalysisTime, 86.2ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-15 20:22:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c13f139-193c-418c-a9d9-7d3a941d12d9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...