./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg --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 a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 .................................................................................................................................................................................................................................................................................... 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg --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 a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 .................................................................................................................................................................................................................................................................................................. 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-b2eff8b [2021-10-28 09:23:27,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:23:27,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:23:27,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:23:27,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:23:27,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:23:27,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:23:27,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:23:27,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:23:27,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:23:27,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:23:27,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:23:27,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:23:27,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:23:27,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:23:27,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:23:27,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:23:27,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:23:27,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:23:27,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:23:27,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:23:27,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:23:27,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:23:27,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:23:27,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:23:27,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:23:27,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:23:27,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:23:27,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:23:27,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:23:27,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:23:27,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:23:27,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:23:27,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:23:27,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:23:27,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:23:27,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:23:27,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:23:27,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:23:27,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:23:27,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:23:27,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:23:27,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:23:27,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:23:27,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:23:27,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:23:27,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:23:27,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:23:27,951 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:23:27,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:23:27,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:23:27,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:23:27,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:23:27,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:23:27,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:23:27,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:23:27,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:23:27,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:23:27,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:23:27,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:23:27,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:23:27,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:23:27,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:23:27,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:23:27,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:27,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:23:27,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:23:27,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:23:27,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:23:27,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:23:27,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:23:27,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:23:27,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:23:27,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:23:27,962 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 [2021-10-28 09:23:28,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:23:28,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:23:28,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:23:28,325 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:23:28,326 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:23:28,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-28 09:23:28,406 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/fe25a8e43/1e01a23efab246e6ba54d60efa6fb378/FLAGde6e0e742 [2021-10-28 09:23:28,954 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:23:28,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-28 09:23:28,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/fe25a8e43/1e01a23efab246e6ba54d60efa6fb378/FLAGde6e0e742 [2021-10-28 09:23:29,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/fe25a8e43/1e01a23efab246e6ba54d60efa6fb378 [2021-10-28 09:23:29,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:23:29,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:23:29,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:29,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:23:29,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:23:29,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@991bf50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29, skipping insertion in model container [2021-10-28 09:23:29,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:23:29,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:29,530 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-28 09:23:29,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:29,553 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:23:29,567 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-28 09:23:29,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:29,587 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:23:29,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29 WrapperNode [2021-10-28 09:23:29,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:29,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:23:29,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:23:29,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:23:29,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:23:29,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:23:29,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:23:29,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:23:29,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:23:29,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:23:29,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:23:29,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:23:29,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (1/1) ... [2021-10-28 09:23:29,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:29,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:23:29,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:23:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:23:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:23:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:23:29,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:23:29,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:23:29,970 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 09:23:29,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:29 BoogieIcfgContainer [2021-10-28 09:23:29,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:23:29,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:23:29,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:23:29,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:23:29,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:23:29" (1/3) ... [2021-10-28 09:23:29,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:29, skipping insertion in model container [2021-10-28 09:23:29,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:29" (2/3) ... [2021-10-28 09:23:29,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:29, skipping insertion in model container [2021-10-28 09:23:29,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:29" (3/3) ... [2021-10-28 09:23:29,989 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-10-28 09:23:29,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:23:29,996 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:23:30,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:23:30,062 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 [2021-10-28 09:23:30,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:23:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-28 09:23:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:23:30,084 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:30,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:23:30,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:23:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-10-28 09:23:30,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:30,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35188767] [2021-10-28 09:23:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:30,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:30,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:30,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35188767] [2021-10-28 09:23:30,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35188767] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:30,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:30,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:23:30,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653225749] [2021-10-28 09:23:30,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:23:30,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:23:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:23:30,303 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-28 09:23:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:30,319 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-28 09:23:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:23:30,321 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 [2021-10-28 09:23:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:30,330 INFO L225 Difference]: With dead ends: 19 [2021-10-28 09:23:30,330 INFO L226 Difference]: Without dead ends: 7 [2021-10-28 09:23:30,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:23:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-28 09:23:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-28 09:23:30,372 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) [2021-10-28 09:23:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-28 09:23:30,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-28 09:23:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:30,375 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-28 09:23:30,376 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) [2021-10-28 09:23:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-28 09:23:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:23:30,377 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:30,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:23:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:23:30,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:23:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-10-28 09:23:30,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:30,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298906056] [2021-10-28 09:23:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:30,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:30,441 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:23:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:30,507 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:23:30,507 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:23:30,509 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:23:30,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:23:30,516 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-28 09:23:30,519 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:23:30,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:23:30 BoogieIcfgContainer [2021-10-28 09:23:30,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:23:30,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:23:30,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:23:30,542 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:23:30,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:29" (3/4) ... [2021-10-28 09:23:30,546 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:23:30,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:23:30,549 INFO L168 Benchmark]: Toolchain (without parser) took 1242.80 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 53.6 MB in the beginning and 93.3 MB in the end (delta: -39.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:30,550 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 88.1 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:30,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.58 ms. Allocated memory is still 88.1 MB. Free memory was 53.5 MB in the beginning and 64.4 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:30,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.08 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 63.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:30,552 INFO L168 Benchmark]: Boogie Preprocessor took 34.96 ms. Allocated memory is still 88.1 MB. Free memory was 62.7 MB in the beginning and 62.1 MB in the end (delta: 681.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:30,553 INFO L168 Benchmark]: RCFGBuilder took 306.50 ms. Allocated memory is still 88.1 MB. Free memory was 61.7 MB in the beginning and 53.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:30,554 INFO L168 Benchmark]: TraceAbstraction took 565.79 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 52.6 MB in the beginning and 93.3 MB in the end (delta: -40.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:30,554 INFO L168 Benchmark]: Witness Printer took 5.40 ms. Allocated memory is still 119.5 MB. Free memory is still 93.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:30,558 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 88.1 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.58 ms. Allocated memory is still 88.1 MB. Free memory was 53.5 MB in the beginning and 64.4 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.08 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 63.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.96 ms. Allocated memory is still 88.1 MB. Free memory was 62.7 MB in the beginning and 62.1 MB in the end (delta: 681.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 306.50 ms. Allocated memory is still 88.1 MB. Free memory was 61.7 MB in the beginning and 53.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 565.79 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 52.6 MB in the beginning and 93.3 MB in the end (delta: -40.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.40 ms. Allocated memory is still 119.5 MB. Free memory is still 93.3 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 11]: 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 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s 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 [2021-10-28 09:23:30,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/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-b2eff8b [2021-10-28 09:23:33,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:23:33,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:23:33,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:23:33,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:23:33,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:23:33,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:23:33,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:23:33,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:23:33,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:23:33,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:23:33,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:23:33,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:23:33,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:23:33,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:23:33,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:23:33,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:23:33,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:23:33,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:23:33,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:23:33,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:23:33,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:23:33,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:23:33,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:23:33,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:23:33,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:23:33,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:23:33,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:23:33,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:23:33,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:23:33,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:23:33,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:23:33,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:23:33,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:23:33,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:23:33,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:23:33,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:23:33,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:23:33,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:23:33,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:23:33,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:23:33,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-28 09:23:33,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:23:33,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:23:33,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:23:33,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:23:33,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:23:33,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:23:33,710 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:23:33,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:23:33,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:23:33,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:23:33,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:23:33,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:23:33,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:23:33,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:23:33,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 09:23:33,712 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 09:23:33,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:23:33,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:23:33,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:23:33,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:23:33,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:23:33,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:23:33,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:23:33,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:33,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:23:33,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:23:33,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:23:33,716 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 09:23:33,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 09:23:33,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:23:33,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:23:33,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:23:33,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:23:33,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 09:23:33,718 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 [2021-10-28 09:23:34,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:23:34,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:23:34,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:23:34,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:23:34,192 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:23:34,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-28 09:23:34,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/780627704/df3abb10a9e64593a8b30ec5f7e02a24/FLAGb9c638df2 [2021-10-28 09:23:34,929 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:23:34,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-28 09:23:34,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/780627704/df3abb10a9e64593a8b30ec5f7e02a24/FLAGb9c638df2 [2021-10-28 09:23:35,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/data/780627704/df3abb10a9e64593a8b30ec5f7e02a24 [2021-10-28 09:23:35,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:23:35,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:23:35,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:35,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:23:35,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:23:35,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f20031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35, skipping insertion in model container [2021-10-28 09:23:35,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:23:35,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:35,468 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_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-28 09:23:35,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:35,495 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:23:35,533 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-28 09:23:35,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:35,585 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:23:35,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35 WrapperNode [2021-10-28 09:23:35,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:35,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:23:35,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:23:35,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:23:35,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:23:35,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:23:35,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:23:35,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:23:35,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:23:35,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:23:35,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:23:35,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:23:35,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (1/1) ... [2021-10-28 09:23:35,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:35,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:35,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:23:35,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:23:35,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 09:23:35,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:23:35,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:23:35,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:23:37,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:23:37,265 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 09:23:37,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:37 BoogieIcfgContainer [2021-10-28 09:23:37,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:23:37,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:23:37,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:23:37,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:23:37,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:23:35" (1/3) ... [2021-10-28 09:23:37,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21045f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:37, skipping insertion in model container [2021-10-28 09:23:37,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:35" (2/3) ... [2021-10-28 09:23:37,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21045f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:37, skipping insertion in model container [2021-10-28 09:23:37,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:37" (3/3) ... [2021-10-28 09:23:37,276 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-10-28 09:23:37,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:23:37,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:23:37,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:23:37,342 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 [2021-10-28 09:23:37,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:23:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-28 09:23:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:23:37,362 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:37,363 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:23:37,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:23:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-10-28 09:23:37,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:37,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660131882] [2021-10-28 09:23:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:37,385 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:37,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:37,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 09:23:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 09:23:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:37,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:37,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:37,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660131882] [2021-10-28 09:23:37,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660131882] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:37,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:37,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 09:23:37,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711346119] [2021-10-28 09:23:37,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:23:37,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:23:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:23:37,662 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-28 09:23:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:37,678 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-28 09:23:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:23:37,680 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 [2021-10-28 09:23:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:37,689 INFO L225 Difference]: With dead ends: 19 [2021-10-28 09:23:37,690 INFO L226 Difference]: Without dead ends: 7 [2021-10-28 09:23:37,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:23:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-28 09:23:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-28 09:23:37,726 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) [2021-10-28 09:23:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-28 09:23:37,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-28 09:23:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-28 09:23:37,729 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) [2021-10-28 09:23:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-28 09:23:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:23:37,730 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:37,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:23:37,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:37,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:37,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:23:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-10-28 09:23:37,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:37,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417568] [2021-10-28 09:23:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:37,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:37,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:37,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 09:23:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:38,097 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:23:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:38,275 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 09:23:38,276 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:23:38,278 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:23:38,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:38,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:38,490 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-28 09:23:38,493 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:23:38,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:23:38 BoogieIcfgContainer [2021-10-28 09:23:38,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:23:38,522 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:23:38,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:23:38,522 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:23:38,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:37" (3/4) ... [2021-10-28 09:23:38,525 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:23:38,578 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:23:38,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:23:38,580 INFO L168 Benchmark]: Toolchain (without parser) took 3296.41 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 26.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:38,581 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 60.8 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:38,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.36 ms. Allocated memory is still 60.8 MB. Free memory was 38.6 MB in the beginning and 43.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:38,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 42.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:38,586 INFO L168 Benchmark]: Boogie Preprocessor took 52.87 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:38,586 INFO L168 Benchmark]: RCFGBuilder took 1583.55 ms. Allocated memory is still 60.8 MB. Free memory was 40.7 MB in the beginning and 31.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:38,587 INFO L168 Benchmark]: TraceAbstraction took 1252.07 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 28.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:38,588 INFO L168 Benchmark]: Witness Printer took 56.96 ms. Allocated memory is still 60.8 MB. Free memory was 28.1 MB in the beginning and 26.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:38,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 60.8 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.36 ms. Allocated memory is still 60.8 MB. Free memory was 38.6 MB in the beginning and 43.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 42.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.87 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1583.55 ms. Allocated memory is still 60.8 MB. Free memory was 40.7 MB in the beginning and 31.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1252.07 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 28.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Witness Printer took 56.96 ms. Allocated memory is still 60.8 MB. Free memory was 28.1 MB in the beginning and 26.5 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 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! [2021-10-28 09:23:38,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e04045-c78f-422f-ac3f-5ecaf1457535/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...