./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_2.i --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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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 e4a477de7e338b2b004255d636f7482e0c252b22 ................................................................................................................................................................................................................................................................................................... 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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 e4a477de7e338b2b004255d636f7482e0c252b22 ................................................................................................................................................................................................................................................................................................................. 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 19:08:24,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:08:24,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:08:24,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:08:24,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:08:24,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:08:24,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:08:24,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:08:24,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:08:24,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:08:24,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:08:24,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:08:24,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:08:24,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:08:24,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:08:24,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:08:24,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:08:24,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:08:24,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:08:24,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:08:24,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:08:24,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:08:24,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:08:24,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:08:24,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:08:24,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:08:24,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:08:24,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:08:24,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:08:24,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:08:24,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:08:24,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:08:24,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:08:24,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:08:24,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:08:24,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:08:24,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:08:24,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:08:24,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:08:24,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:08:24,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:08:24,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:08:24,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:08:24,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:08:24,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:08:24,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:08:24,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:08:24,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:08:24,350 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:08:24,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:08:24,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:08:24,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:08:24,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:08:24,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:08:24,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:08:24,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:08:24,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:08:24,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:08:24,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:08:24,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:08:24,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:08:24,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:08:24,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:08:24,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:08:24,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:24,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:08:24,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:08:24,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:08:24,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:08:24,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:08:24,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:08:24,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:08:24,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:08:24,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:08:24,357 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2021-10-15 19:08:24,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:08:24,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:08:24,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:08:24,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:08:24,626 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:08:24,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2021-10-15 19:08:24,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/93fdcae4c/0db5e613499e46f5b22709872dae8c06/FLAGf45eee051 [2021-10-15 19:08:25,264 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:08:25,265 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i [2021-10-15 19:08:25,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/93fdcae4c/0db5e613499e46f5b22709872dae8c06/FLAGf45eee051 [2021-10-15 19:08:25,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/93fdcae4c/0db5e613499e46f5b22709872dae8c06 [2021-10-15 19:08:25,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:08:25,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:08:25,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:25,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:08:25,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:08:25,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733e9cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25, skipping insertion in model container [2021-10-15 19:08:25,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:08:25,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:08:25,906 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-10-15 19:08:25,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:25,918 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:08:25,934 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-10-15 19:08:25,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:25,949 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:08:25,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25 WrapperNode [2021-10-15 19:08:25,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:25,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:25,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:08:25,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:08:25,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:25,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:08:25,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:08:25,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:08:25,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:25,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:26,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:26,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:26,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:08:26,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:08:26,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:08:26,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:08:26,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (1/1) ... [2021-10-15 19:08:26,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:26,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:26,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:08:26,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:08:26,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:08:26,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:08:26,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:08:26,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:08:26,309 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:08:26,309 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-15 19:08:26,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:26 BoogieIcfgContainer [2021-10-15 19:08:26,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:08:26,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:08:26,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:08:26,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:08:26,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:08:25" (1/3) ... [2021-10-15 19:08:26,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38055cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:26, skipping insertion in model container [2021-10-15 19:08:26,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:25" (2/3) ... [2021-10-15 19:08:26,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38055cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:26, skipping insertion in model container [2021-10-15 19:08:26,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:26" (3/3) ... [2021-10-15 19:08:26,320 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2021-10-15 19:08:26,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:08:26,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:08:26,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:08:26,386 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 19:08:26,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:08:26,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 12 transitions, 24 flow [2021-10-15 19:08:26,416 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2021-10-15 19:08:26,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:26,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:08:26,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 12 transitions, 24 flow [2021-10-15 19:08:26,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 7 transitions, 14 flow [2021-10-15 19:08:26,425 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-10-15 19:08:26,425 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:26,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:26,426 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:08:26,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-10-15 19:08:26,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:26,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701984162] [2021-10-15 19:08:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:26,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:26,594 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 19:08:26,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701984162] [2021-10-15 19:08:26,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701984162] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:26,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:26,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:08:26,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998351677] [2021-10-15 19:08:26,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:08:26,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:08:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:08:26,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 12 [2021-10-15 19:08:26,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 7 transitions, 14 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:26,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:26,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 12 [2021-10-15 19:08:26,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:26,641 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-10-15 19:08:26,641 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:26,641 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 19:08:26,643 INFO L132 encePairwiseOnDemand]: 11/12 looper letters, 0 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2021-10-15 19:08:26,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:08:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:08:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2021-10-15 19:08:26,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 19:08:26,656 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 21 transitions. [2021-10-15 19:08:26,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 21 transitions. [2021-10-15 19:08:26,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:26,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 21 transitions. [2021-10-15 19:08:26,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:26,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 19:08:26,667 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 19:08:26,670 INFO L186 Difference]: Start difference. First operand has 7 places, 7 transitions, 14 flow. Second operand 2 states and 21 transitions. [2021-10-15 19:08:26,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:26,673 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 19:08:26,678 INFO L242 Difference]: Finished difference. Result has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:26,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, 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 19:08:26,697 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 1 predicate places. [2021-10-15 19:08:26,698 INFO L470 AbstractCegarLoop]: Abstraction has has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:26,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:26,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:26,699 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:08:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:08:26,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-10-15 19:08:26,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:26,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580163064] [2021-10-15 19:08:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:26,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:08:26,727 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:08:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:08:26,763 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:08:26,763 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:08:26,765 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:08:26,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:08:26,774 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:08:26,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:08:26 BoogieIcfgContainer [2021-10-15 19:08:26,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:08:26,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:08:26,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:08:26,793 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:08:26,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:26" (3/4) ... [2021-10-15 19:08:26,797 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:08:26,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:08:26,815 INFO L168 Benchmark]: Toolchain (without parser) took 1187.55 ms. Allocated memory is still 132.1 MB. Free memory was 98.9 MB in the beginning and 74.3 MB in the end (delta: 24.6 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,815 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:08:26,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.54 ms. Allocated memory is still 132.1 MB. Free memory was 98.6 MB in the beginning and 107.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.36 ms. Allocated memory is still 132.1 MB. Free memory was 107.4 MB in the beginning and 105.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,818 INFO L168 Benchmark]: Boogie Preprocessor took 20.18 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 104.9 MB in the end (delta: 824.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,819 INFO L168 Benchmark]: RCFGBuilder took 306.64 ms. Allocated memory is still 132.1 MB. Free memory was 104.9 MB in the beginning and 96.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,820 INFO L168 Benchmark]: TraceAbstraction took 479.61 ms. Allocated memory is still 132.1 MB. Free memory was 95.7 MB in the beginning and 74.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:26,821 INFO L168 Benchmark]: Witness Printer took 20.10 ms. Allocated memory is still 132.1 MB. Free memory is still 74.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:08:26,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.54 ms. Allocated memory is still 132.1 MB. Free memory was 98.6 MB in the beginning and 107.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.36 ms. Allocated memory is still 132.1 MB. Free memory was 107.4 MB in the beginning and 105.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.18 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 104.9 MB in the end (delta: 824.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 306.64 ms. Allocated memory is still 132.1 MB. Free memory was 104.9 MB in the beginning and 96.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 479.61 ms. Allocated memory is still 132.1 MB. Free memory was 95.7 MB in the beginning and 74.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 20.10 ms. Allocated memory is still 132.1 MB. Free memory is still 74.3 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 - UnprovableResult [Line: 29]: 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 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 398.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 74.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.9ms, 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: 8.3ms SsaConstructionTime, 49.4ms SatisfiabilityAnalysisTime, 50.0ms 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 19:08:26,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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 19:08:29,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:08:29,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:08:29,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:08:29,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:08:29,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:08:29,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:08:29,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:08:29,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:08:29,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:08:29,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:08:29,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:08:29,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:08:29,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:08:29,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:08:29,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:08:29,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:08:29,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:08:29,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:08:29,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:08:29,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:08:29,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:08:29,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:08:29,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:08:29,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:08:29,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:08:29,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:08:29,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:08:29,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:08:29,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:08:29,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:08:29,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:08:29,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:08:29,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:08:29,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:08:29,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:08:29,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:08:29,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:08:29,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:08:29,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:08:29,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:08:29,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:08:29,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:08:29,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:08:29,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:08:29,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:08:29,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:08:29,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:08:29,769 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:08:29,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:08:29,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:08:29,770 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:08:29,771 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:08:29,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:08:29,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:08:29,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:08:29,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:08:29,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:08:29,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:08:29,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:08:29,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:29,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:08:29,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:08:29,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:08:29,773 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:08:29,773 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:08:29,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:08:29,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:08:29,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:08:29,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:08:29,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:08:29,774 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2021-10-15 19:08:30,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:08:30,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:08:30,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:08:30,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:08:30,238 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:08:30,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2021-10-15 19:08:30,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/328460ea3/5767823cbad946939f53032242f08ddf/FLAG97c18c185 [2021-10-15 19:08:30,834 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:08:30,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i [2021-10-15 19:08:30,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/328460ea3/5767823cbad946939f53032242f08ddf/FLAG97c18c185 [2021-10-15 19:08:31,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/data/328460ea3/5767823cbad946939f53032242f08ddf [2021-10-15 19:08:31,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:08:31,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:08:31,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:31,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:08:31,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:08:31,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645f478a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31, skipping insertion in model container [2021-10-15 19:08:31,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:08:31,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:08:31,400 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-10-15 19:08:31,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:31,418 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:08:31,435 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_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-10-15 19:08:31,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:08:31,477 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:08:31,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31 WrapperNode [2021-10-15 19:08:31,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:08:31,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:31,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:08:31,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:08:31,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:08:31,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:08:31,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:08:31,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:08:31,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:08:31,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:08:31,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:08:31,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:08:31,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (1/1) ... [2021-10-15 19:08:31,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:08:31,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:08:31,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:08:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:08:31,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:08:31,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:08:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:08:31,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:08:34,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:08:34,005 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-15 19:08:34,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:34 BoogieIcfgContainer [2021-10-15 19:08:34,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:08:34,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:08:34,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:08:34,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:08:34,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:08:31" (1/3) ... [2021-10-15 19:08:34,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf21d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:34, skipping insertion in model container [2021-10-15 19:08:34,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:08:31" (2/3) ... [2021-10-15 19:08:34,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf21d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:08:34, skipping insertion in model container [2021-10-15 19:08:34,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:34" (3/3) ... [2021-10-15 19:08:34,017 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2021-10-15 19:08:34,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:08:34,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:08:34,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:08:34,081 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 19:08:34,082 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:08:34,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 12 transitions, 24 flow [2021-10-15 19:08:34,110 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2021-10-15 19:08:34,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:34,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:08:34,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 12 transitions, 24 flow [2021-10-15 19:08:34,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 7 places, 7 transitions, 14 flow [2021-10-15 19:08:34,120 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-10-15 19:08:34,120 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:34,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:34,121 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:08:34,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-10-15 19:08:34,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:08:34,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91393832] [2021-10-15 19:08:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:34,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:08:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:08:34,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:08:34,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:08:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 19:08:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:08:34,793 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 19:08:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:08:34,830 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 19:08:34,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:08:34,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91393832] [2021-10-15 19:08:34,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91393832] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:34,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:34,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 19:08:34,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703285364] [2021-10-15 19:08:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:08:34,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:08:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:08:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:08:34,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 12 [2021-10-15 19:08:34,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 7 places, 7 transitions, 14 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:34,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:34,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 12 [2021-10-15 19:08:34,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:34,881 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-10-15 19:08:34,881 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:08:34,882 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 19:08:34,882 INFO L132 encePairwiseOnDemand]: 11/12 looper letters, 0 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2021-10-15 19:08:34,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:08:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:08:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2021-10-15 19:08:34,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 19:08:34,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 21 transitions. [2021-10-15 19:08:34,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 21 transitions. [2021-10-15 19:08:34,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:34,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 21 transitions. [2021-10-15 19:08:34,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:34,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 19:08:34,906 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 19:08:34,908 INFO L186 Difference]: Start difference. First operand has 7 places, 7 transitions, 14 flow. Second operand 2 states and 21 transitions. [2021-10-15 19:08:34,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:34,910 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 19:08:34,913 INFO L242 Difference]: Finished difference. Result has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:34,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, 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 19:08:34,916 INFO L334 CegarLoopForPetriNet]: 7 programPoint places, 1 predicate places. [2021-10-15 19:08:34,916 INFO L470 AbstractCegarLoop]: Abstraction has has 8 places, 6 transitions, 12 flow [2021-10-15 19:08:34,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:34,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:34,918 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:08:34,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-15 19:08:35,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:08:35,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-10-15 19:08:35,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:08:35,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963453925] [2021-10-15 19:08:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:35,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:08:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:08:35,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:08:35,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:09:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:09:35,788 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:11:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:11:17,878 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 19:11:17,878 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:11:17,880 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:11:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:18,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:11:18,088 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:11:18,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:11:18 BoogieIcfgContainer [2021-10-15 19:11:18,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:11:18,103 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:11:18,103 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:11:18,103 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:11:18,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:08:34" (3/4) ... [2021-10-15 19:11:18,105 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:11:18,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:11:18,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:11:18,143 INFO L168 Benchmark]: Toolchain (without parser) took 166931.95 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 43.4 MB in the beginning and 53.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,144 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:18,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.93 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 47.2 MB in the end (delta: -4.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.74 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 45.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,146 INFO L168 Benchmark]: Boogie Preprocessor took 47.63 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:18,146 INFO L168 Benchmark]: RCFGBuilder took 2412.44 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 35.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,147 INFO L168 Benchmark]: TraceAbstraction took 164093.19 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 35.1 MB in the beginning and 55.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,148 INFO L168 Benchmark]: Witness Printer took 38.00 ms. Allocated memory is still 88.1 MB. Free memory was 55.0 MB in the beginning and 53.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:18,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.93 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 47.2 MB in the end (delta: -4.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.74 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 45.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.63 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2412.44 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 35.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 164093.19 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 35.1 MB in the beginning and 55.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Witness Printer took 38.00 ms. Allocated memory is still 88.1 MB. Free memory was 55.0 MB in the beginning and 53.2 MB in the end (delta: 1.8 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: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 164016.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 51.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.8ms, 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: 16.2ms SsaConstructionTime, 61091.8ms SatisfiabilityAnalysisTime, 133.2ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 26 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 19:11:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff4091-6a38-4a97-8d6d-c8e0ee65e05d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...