./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be --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 fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f ................................................................................................................................................................................................................................................................................... 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_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be --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 fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f ................................................................................................................................................................................................................................................................................................. 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-e943c26 [2021-10-21 19:45:26,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:45:26,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:45:26,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:45:26,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:45:26,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:45:26,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:45:26,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:45:26,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:45:26,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:45:26,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:45:26,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:45:26,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:45:26,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:45:26,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:45:26,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:45:26,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:45:26,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:45:26,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:45:26,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:45:26,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:45:26,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:45:26,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:45:26,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:45:26,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:45:26,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:45:26,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:45:26,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:45:26,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:45:26,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:45:26,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:45:26,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:45:26,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:45:26,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:45:26,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:45:26,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:45:26,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:45:26,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:45:26,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:45:26,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:45:26,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:45:26,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:45:26,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:45:26,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:45:26,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:45:26,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:45:26,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:45:26,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:45:26,622 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:45:26,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:45:26,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:45:26,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:45:26,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:45:26,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:45:26,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:45:26,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:45:26,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:45:26,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:45:26,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:45:26,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:45:26,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:45:26,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:45:26,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:45:26,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:45:26,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:26,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:45:26,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:45:26,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:45:26,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:45:26,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:45:26,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:45:26,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:45:26,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:45:26,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:45:26,634 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_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f [2021-10-21 19:45:26,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:45:27,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:45:27,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:45:27,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:45:27,037 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:45:27,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-21 19:45:27,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/7b8f463ba/671a3bba710249b18d65a4c40a2a6dd4/FLAG555d1f9cd [2021-10-21 19:45:27,775 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:45:27,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-21 19:45:27,785 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/7b8f463ba/671a3bba710249b18d65a4c40a2a6dd4/FLAG555d1f9cd [2021-10-21 19:45:28,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/7b8f463ba/671a3bba710249b18d65a4c40a2a6dd4 [2021-10-21 19:45:28,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:45:28,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:45:28,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:28,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:45:28,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:45:28,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14972dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28, skipping insertion in model container [2021-10-21 19:45:28,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:45:28,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:45:28,504 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_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-21 19:45:28,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:28,532 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:45:28,550 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_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-21 19:45:28,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:28,574 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:45:28,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28 WrapperNode [2021-10-21 19:45:28,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:28,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:28,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:45:28,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:45:28,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:28,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:45:28,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:45:28,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:45:28,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:45:28,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:45:28,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:45:28,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:45:28,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (1/1) ... [2021-10-21 19:45:28,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:28,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:45:28,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:45:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:45:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:45:28,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:45:29,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:45:29,044 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 19:45:29,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:29 BoogieIcfgContainer [2021-10-21 19:45:29,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:45:29,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:45:29,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:45:29,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:45:29,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:45:28" (1/3) ... [2021-10-21 19:45:29,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0707b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:29, skipping insertion in model container [2021-10-21 19:45:29,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:28" (2/3) ... [2021-10-21 19:45:29,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0707b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:29, skipping insertion in model container [2021-10-21 19:45:29,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:29" (3/3) ... [2021-10-21 19:45:29,062 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-21 19:45:29,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:45:29,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:45:29,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:45:29,158 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:45:29,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:45:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-10-21 19:45:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:45:29,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:29,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:45:29,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:45:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-21 19:45:29,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:29,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823074579] [2021-10-21 19:45:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:29,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:29,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:29,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823074579] [2021-10-21 19:45:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823074579] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:29,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:29,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:45:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542701216] [2021-10-21 19:45:29,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:45:29,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:45:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:45:29,521 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:45:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:29,553 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-21 19:45:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:45:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:45:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:29,564 INFO L225 Difference]: With dead ends: 21 [2021-10-21 19:45:29,577 INFO L226 Difference]: Without dead ends: 7 [2021-10-21 19:45:29,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:45:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-21 19:45:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-21 19:45:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-10-21 19:45:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-21 19:45:29,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-21 19:45:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:29,630 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-21 19:45:29,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:45:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-21 19:45:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:45:29,631 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:29,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:45:29,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:45:29,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:45:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-21 19:45:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:29,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368615182] [2021-10-21 19:45:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:29,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:29,693 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:45:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:29,803 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:45:29,804 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:45:29,806 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:45:29,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:45:29,817 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:45:29,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:45:29 BoogieIcfgContainer [2021-10-21 19:45:29,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:45:29,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:45:29,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:45:29,884 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:45:29,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:29" (3/4) ... [2021-10-21 19:45:29,889 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:45:29,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:45:29,894 INFO L168 Benchmark]: Toolchain (without parser) took 1735.25 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 51.9 MB in the beginning and 91.8 MB in the end (delta: -39.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:29,895 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:29,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.20 ms. Allocated memory is still 90.2 MB. Free memory was 51.8 MB in the beginning and 66.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:29,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.51 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 64.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:29,910 INFO L168 Benchmark]: Boogie Preprocessor took 50.60 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.8 MB in the end (delta: 956.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:29,912 INFO L168 Benchmark]: RCFGBuilder took 366.96 ms. Allocated memory is still 90.2 MB. Free memory was 63.8 MB in the beginning and 54.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:29,914 INFO L168 Benchmark]: TraceAbstraction took 833.10 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 54.4 MB in the beginning and 92.6 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:29,915 INFO L168 Benchmark]: Witness Printer took 6.22 ms. Allocated memory is still 115.3 MB. Free memory is still 91.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:29,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.20 ms. Allocated memory is still 90.2 MB. Free memory was 51.8 MB in the beginning and 66.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.51 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 64.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.60 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.8 MB in the end (delta: 956.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 366.96 ms. Allocated memory is still 90.2 MB. Free memory was 63.8 MB in the beginning and 54.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 833.10 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 54.4 MB in the beginning and 92.6 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.22 ms. Allocated memory is still 115.3 MB. Free memory is still 91.8 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: 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. OverallTime: 670.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.8ms, AutomataDifference: 94.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 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=12occurred 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: 17.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.2ms SsaConstructionTime, 93.8ms SatisfiabilityAnalysisTime, 104.6ms 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 [2021-10-21 19:45:29,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/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-e943c26 [2021-10-21 19:45:33,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:45:33,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:45:33,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:45:33,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:45:33,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:45:33,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:45:33,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:45:33,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:45:33,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:45:33,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:45:33,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:45:33,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:45:33,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:45:33,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:45:33,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:45:33,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:45:33,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:45:33,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:45:33,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:45:33,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:45:33,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:45:33,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:45:33,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:45:33,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:45:33,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:45:33,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:45:33,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:45:33,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:45:33,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:45:33,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:45:33,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:45:33,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:45:33,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:45:33,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:45:33,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:45:33,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:45:33,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:45:33,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:45:33,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:45:33,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:45:33,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 19:45:33,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:45:33,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:45:33,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:45:33,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:45:33,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:45:33,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:45:33,427 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:45:33,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:45:33,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:45:33,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:45:33,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:45:33,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:45:33,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:45:33,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:45:33,430 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:45:33,430 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:45:33,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:45:33,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:45:33,431 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:45:33,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:45:33,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:45:33,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:45:33,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:45:33,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:33,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:45:33,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:45:33,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:45:33,434 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:45:33,434 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:45:33,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:45:33,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:45:33,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:45:33,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:45:33,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:45:33,436 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_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa8669e514192921cf64fdf0639cd37a443816328604ea9b0272ab52a6769b9f [2021-10-21 19:45:33,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:45:33,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:45:33,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:45:33,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:45:33,928 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:45:33,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-21 19:45:34,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/eb86851ed/7574c100cdc746fb9f0cd4a75ea93588/FLAGf6292437b [2021-10-21 19:45:34,746 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:45:34,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-21 19:45:34,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/eb86851ed/7574c100cdc746fb9f0cd4a75ea93588/FLAGf6292437b [2021-10-21 19:45:35,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/data/eb86851ed/7574c100cdc746fb9f0cd4a75ea93588 [2021-10-21 19:45:35,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:45:35,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:45:35,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:35,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:45:35,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:45:35,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad3249a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35, skipping insertion in model container [2021-10-21 19:45:35,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:45:35,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:45:35,320 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_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-21 19:45:35,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:35,359 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:45:35,379 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_599e149d-d402-49a0-8ef9-e8e94d654912/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-21 19:45:35,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:35,405 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:45:35,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35 WrapperNode [2021-10-21 19:45:35,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:35,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:35,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:45:35,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:45:35,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:35,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:45:35,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:45:35,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:45:35,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:45:35,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:45:35,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:45:35,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:45:35,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (1/1) ... [2021-10-21 19:45:35,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:35,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:45:35,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:45:35,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:45:35,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:45:35,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:45:35,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:45:36,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:45:36,616 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 19:45:36,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:36 BoogieIcfgContainer [2021-10-21 19:45:36,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:45:36,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:45:36,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:45:36,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:45:36,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:45:35" (1/3) ... [2021-10-21 19:45:36,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc268c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:36, skipping insertion in model container [2021-10-21 19:45:36,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:35" (2/3) ... [2021-10-21 19:45:36,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc268c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:36, skipping insertion in model container [2021-10-21 19:45:36,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:36" (3/3) ... [2021-10-21 19:45:36,630 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-21 19:45:36,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:45:36,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:45:36,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:45:36,702 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:45:36,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:45:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-10-21 19:45:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:45:36,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:36,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:45:36,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:45:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-21 19:45:36,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:45:36,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683921822] [2021-10-21 19:45:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:36,759 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:45:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:45:36,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:45:36,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:45:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:45:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:37,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:45:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:37,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:45:37,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683921822] [2021-10-21 19:45:37,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683921822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:37,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:37,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:45:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861442807] [2021-10-21 19:45:37,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:45:37,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:45:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:45:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:45:37,185 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:45:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:37,216 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-21 19:45:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:45:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:45:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:37,227 INFO L225 Difference]: With dead ends: 21 [2021-10-21 19:45:37,228 INFO L226 Difference]: Without dead ends: 7 [2021-10-21 19:45:37,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:45:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-21 19:45:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-21 19:45:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-10-21 19:45:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-21 19:45:37,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-21 19:45:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:37,267 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-21 19:45:37,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:45:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-21 19:45:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:45:37,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:37,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:45:37,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:37,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:45:37,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:45:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-21 19:45:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:45:37,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385665514] [2021-10-21 19:45:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:37,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:45:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:45:37,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:45:37,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:45:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:37,657 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:45:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:37,821 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:45:37,821 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:45:37,824 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:45:37,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:38,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:45:38,043 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:45:38,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:45:38 BoogieIcfgContainer [2021-10-21 19:45:38,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:45:38,068 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:45:38,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:45:38,068 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:45:38,069 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:36" (3/4) ... [2021-10-21 19:45:38,071 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:45:38,115 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:45:38,115 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:45:38,117 INFO L168 Benchmark]: Toolchain (without parser) took 3021.69 ms. Allocated memory is still 86.0 MB. Free memory was 50.8 MB in the beginning and 65.1 MB in the end (delta: -14.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:38,118 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 86.0 MB. Free memory is still 67.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:38,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.10 ms. Allocated memory is still 86.0 MB. Free memory was 50.5 MB in the beginning and 64.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:38,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.69 ms. Allocated memory is still 86.0 MB. Free memory was 64.6 MB in the beginning and 69.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:38,120 INFO L168 Benchmark]: Boogie Preprocessor took 32.04 ms. Allocated memory is still 86.0 MB. Free memory was 69.9 MB in the beginning and 68.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:38,121 INFO L168 Benchmark]: RCFGBuilder took 1100.97 ms. Allocated memory is still 86.0 MB. Free memory was 68.8 MB in the beginning and 59.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:38,122 INFO L168 Benchmark]: TraceAbstraction took 1446.72 ms. Allocated memory is still 86.0 MB. Free memory was 59.0 MB in the beginning and 66.8 MB in the end (delta: -7.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:38,122 INFO L168 Benchmark]: Witness Printer took 47.46 ms. Allocated memory is still 86.0 MB. Free memory was 66.8 MB in the beginning and 65.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:38,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 86.0 MB. Free memory is still 67.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.10 ms. Allocated memory is still 86.0 MB. Free memory was 50.5 MB in the beginning and 64.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.69 ms. Allocated memory is still 86.0 MB. Free memory was 64.6 MB in the beginning and 69.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.04 ms. Allocated memory is still 86.0 MB. Free memory was 69.9 MB in the beginning and 68.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1100.97 ms. Allocated memory is still 86.0 MB. Free memory was 68.8 MB in the beginning and 59.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1446.72 ms. Allocated memory is still 86.0 MB. Free memory was 59.0 MB in the beginning and 66.8 MB in the end (delta: -7.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * Witness Printer took 47.46 ms. Allocated memory is still 86.0 MB. Free memory was 66.8 MB in the beginning and 65.1 MB in the end (delta: 1.7 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. OverallTime: 1349.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 17.8ms, AutomataDifference: 64.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 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=12occurred 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: 17.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.6ms SsaConstructionTime, 265.2ms SatisfiabilityAnalysisTime, 187.6ms 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! [2021-10-21 19:45:38,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599e149d-d402-49a0-8ef9-e8e94d654912/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...