./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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 cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 ........................................................................................................................................................................................................................................................................................... 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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 cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 ......................................................................................................................................................................................................................................................................................................... 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 08:49:12,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:49:12,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:49:12,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:49:12,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:49:12,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:49:12,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:49:12,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:49:12,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:49:12,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:49:12,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:49:12,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:49:12,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:49:12,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:49:12,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:49:12,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:49:12,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:49:12,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:49:12,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:49:12,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:49:12,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:49:12,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:49:12,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:49:12,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:49:12,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:49:12,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:49:12,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:49:12,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:49:12,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:49:12,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:49:12,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:49:12,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:49:12,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:49:12,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:49:12,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:49:12,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:49:12,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:49:12,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:49:12,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:49:12,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:49:12,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:49:12,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:49:12,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:49:12,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:49:12,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:49:12,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:49:12,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:49:12,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:49:12,264 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:49:12,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:49:12,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:49:12,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:49:12,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:49:12,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:49:12,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:49:12,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:49:12,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:49:12,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:49:12,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:49:12,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:49:12,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:49:12,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:49:12,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:49:12,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:49:12,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:12,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:49:12,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:49:12,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:49:12,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:49:12,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:49:12,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:49:12,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:49:12,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:49:12,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:49:12,276 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-10-28 08:49:12,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:49:12,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:49:12,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:49:12,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:49:12,735 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:49:12,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-28 08:49:12,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/e031d09ad/135943728cd8429889f5d343cb90ab77/FLAGeace531de [2021-10-28 08:49:13,540 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:49:13,542 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-28 08:49:13,556 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/e031d09ad/135943728cd8429889f5d343cb90ab77/FLAGeace531de [2021-10-28 08:49:13,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/e031d09ad/135943728cd8429889f5d343cb90ab77 [2021-10-28 08:49:13,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:49:13,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:49:13,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:13,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:49:13,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:49:13,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:13,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233dffde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13, skipping insertion in model container [2021-10-28 08:49:13,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:13,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:49:13,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:49:13,869 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-28 08:49:13,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:13,904 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:49:13,921 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-28 08:49:13,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:13,950 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:49:13,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13 WrapperNode [2021-10-28 08:49:13,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:13,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:49:13,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:49:13,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:49:13,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:13,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:49:14,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:49:14,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:49:14,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:49:14,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:49:14,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:49:14,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:49:14,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:49:14,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (1/1) ... [2021-10-28 08:49:14,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:14,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:49:14,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:49:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:49:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:49:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:49:14,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:49:14,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:49:14,456 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 08:49:14,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:14 BoogieIcfgContainer [2021-10-28 08:49:14,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:49:14,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:49:14,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:49:14,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:49:14,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:49:13" (1/3) ... [2021-10-28 08:49:14,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246314ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:14, skipping insertion in model container [2021-10-28 08:49:14,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:13" (2/3) ... [2021-10-28 08:49:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246314ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:14, skipping insertion in model container [2021-10-28 08:49:14,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:14" (3/3) ... [2021-10-28 08:49:14,470 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-28 08:49:14,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:49:14,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:49:14,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:49:14,570 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 08:49:14,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:49:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 08:49:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 08:49:14,597 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:14,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 08:49:14,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:49:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-28 08:49:14,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:14,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478541892] [2021-10-28 08:49:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:14,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:14,871 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 08:49:14,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:14,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478541892] [2021-10-28 08:49:14,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478541892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:14,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:14,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:49:14,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985324485] [2021-10-28 08:49:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:49:14,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:49:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:49:14,914 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 08:49:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:14,936 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-28 08:49:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:49:14,937 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 08:49:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:14,951 INFO L225 Difference]: With dead ends: 20 [2021-10-28 08:49:14,951 INFO L226 Difference]: Without dead ends: 8 [2021-10-28 08:49:14,955 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 08:49:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-28 08:49:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-28 08:49:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 08:49:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-28 08:49:14,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-28 08:49:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:14,995 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-28 08:49:14,995 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 08:49:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-28 08:49:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 08:49:14,997 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:14,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:14,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:49:14,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:49:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-28 08:49:15,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:15,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259290372] [2021-10-28 08:49:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:15,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:15,069 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:49:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:15,153 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:49:15,154 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:49:15,156 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:49:15,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:49:15,164 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-28 08:49:15,170 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:49:15,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:49:15 BoogieIcfgContainer [2021-10-28 08:49:15,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:49:15,209 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:49:15,209 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:49:15,210 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:49:15,210 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:14" (3/4) ... [2021-10-28 08:49:15,217 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:49:15,217 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:49:15,221 INFO L168 Benchmark]: Toolchain (without parser) took 1633.04 ms. Allocated memory is still 98.6 MB. Free memory was 76.0 MB in the beginning and 37.1 MB in the end (delta: 38.9 MB). Peak memory consumption was 37.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,222 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:15,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.06 ms. Allocated memory is still 98.6 MB. Free memory was 75.8 MB in the beginning and 72.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.70 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 70.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,229 INFO L168 Benchmark]: Boogie Preprocessor took 51.48 ms. Allocated memory is still 98.6 MB. Free memory was 70.6 MB in the beginning and 69.6 MB in the end (delta: 975.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:15,237 INFO L168 Benchmark]: RCFGBuilder took 405.57 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 60.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,238 INFO L168 Benchmark]: TraceAbstraction took 746.76 ms. Allocated memory is still 98.6 MB. Free memory was 59.9 MB in the beginning and 37.4 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,239 INFO L168 Benchmark]: Witness Printer took 8.81 ms. Allocated memory is still 98.6 MB. Free memory was 37.4 MB in the beginning and 37.1 MB in the end (delta: 362.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:15,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.06 ms. Allocated memory is still 98.6 MB. Free memory was 75.8 MB in the beginning and 72.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.70 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 70.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.48 ms. Allocated memory is still 98.6 MB. Free memory was 70.6 MB in the beginning and 69.6 MB in the end (delta: 975.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 405.57 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 60.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 746.76 ms. Allocated memory is still 98.6 MB. Free memory was 59.9 MB in the beginning and 37.4 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 8.81 ms. Allocated memory is still 98.6 MB. Free memory was 37.4 MB in the beginning and 37.1 MB in the end (delta: 362.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 14]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, 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: 12 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=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, 0.0s 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, 13 NumberOfCodeBlocks, 13 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 08:49:15,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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 08:49:18,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:49:18,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:49:18,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:49:18,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:49:18,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:49:18,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:49:18,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:49:18,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:49:18,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:49:18,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:49:18,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:49:18,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:49:18,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:49:18,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:49:18,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:49:18,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:49:18,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:49:18,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:49:18,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:49:18,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:49:18,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:49:18,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:49:18,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:49:18,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:49:18,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:49:18,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:49:18,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:49:18,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:49:18,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:49:18,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:49:18,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:49:18,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:49:18,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:49:18,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:49:18,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:49:18,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:49:18,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:49:18,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:49:18,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:49:18,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:49:18,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-28 08:49:18,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:49:18,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:49:18,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:49:18,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:49:18,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:49:18,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:49:18,743 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:49:18,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:49:18,744 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:49:18,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:49:18,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:49:18,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:49:18,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:49:18,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:49:18,747 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 08:49:18,747 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 08:49:18,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:49:18,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:49:18,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:49:18,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:49:18,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:49:18,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:49:18,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:49:18,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:18,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:49:18,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:49:18,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:49:18,751 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 08:49:18,752 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 08:49:18,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:49:18,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:49:18,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:49:18,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:49:18,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 08:49:18,754 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-10-28 08:49:19,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:49:19,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:49:19,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:49:19,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:49:19,287 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:49:19,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-28 08:49:19,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/55c2b9e41/05d74a9e89ec4089b8d0435095fca5e4/FLAGda4a04bb9 [2021-10-28 08:49:20,040 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:49:20,042 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-28 08:49:20,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/55c2b9e41/05d74a9e89ec4089b8d0435095fca5e4/FLAGda4a04bb9 [2021-10-28 08:49:20,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/data/55c2b9e41/05d74a9e89ec4089b8d0435095fca5e4 [2021-10-28 08:49:20,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:49:20,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:49:20,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:20,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:49:20,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:49:20,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3ae4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20, skipping insertion in model container [2021-10-28 08:49:20,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:49:20,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:49:20,681 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-28 08:49:20,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:20,800 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:49:20,826 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_2549daf4-74f3-4b9f-bb4c-536b9b58155f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-28 08:49:20,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:49:20,873 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:49:20,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20 WrapperNode [2021-10-28 08:49:20,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:49:20,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:49:20,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:49:20,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:49:20,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:49:20,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:49:20,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:49:20,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:49:20,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:20,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:21,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:21,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:49:21,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:49:21,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:49:21,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:49:21,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (1/1) ... [2021-10-28 08:49:21,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:49:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:21,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:49:21,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:49:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:49:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:49:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:49:21,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:49:24,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:49:24,408 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 08:49:24,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:24 BoogieIcfgContainer [2021-10-28 08:49:24,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:49:24,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:49:24,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:49:24,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:49:24,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:49:20" (1/3) ... [2021-10-28 08:49:24,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4910588c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:24, skipping insertion in model container [2021-10-28 08:49:24,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:49:20" (2/3) ... [2021-10-28 08:49:24,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4910588c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:49:24, skipping insertion in model container [2021-10-28 08:49:24,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:24" (3/3) ... [2021-10-28 08:49:24,422 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-28 08:49:24,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:49:24,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:49:24,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:49:24,499 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 08:49:24,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:49:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 08:49:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 08:49:24,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:24,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 08:49:24,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:49:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-28 08:49:24,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:24,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484718068] [2021-10-28 08:49:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:24,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:24,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:24,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:49:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:24,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 08:49:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:25,037 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 08:49:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:25,070 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 08:49:25,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484718068] [2021-10-28 08:49:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484718068] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:49:25,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:49:25,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:49:25,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758037915] [2021-10-28 08:49:25,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:49:25,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:49:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:49:25,102 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 08:49:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:25,118 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-28 08:49:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:49:25,120 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 08:49:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:25,129 INFO L225 Difference]: With dead ends: 20 [2021-10-28 08:49:25,130 INFO L226 Difference]: Without dead ends: 8 [2021-10-28 08:49:25,133 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 08:49:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-28 08:49:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-28 08:49:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 08:49:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-28 08:49:25,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-28 08:49:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:25,168 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-28 08:49:25,169 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 08:49:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-28 08:49:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 08:49:25,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:25,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:25,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-28 08:49:25,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:25,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:49:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-28 08:49:25,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:25,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598581621] [2021-10-28 08:49:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:25,387 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:25,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:49:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:26,071 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:49:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:49:26,807 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 08:49:26,807 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:49:26,809 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:49:26,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:27,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:27,015 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-28 08:49:27,018 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:49:27,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:49:27 BoogieIcfgContainer [2021-10-28 08:49:27,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:49:27,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:49:27,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:49:27,044 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:49:27,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:49:24" (3/4) ... [2021-10-28 08:49:27,047 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:49:27,095 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:49:27,095 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:49:27,098 INFO L168 Benchmark]: Toolchain (without parser) took 6702.58 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.8 MB in the beginning and 36.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,099 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:27,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.95 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.6 MB in the beginning and 56.2 MB in the end (delta: -26.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,100 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 73.4 MB. Free memory was 56.2 MB in the beginning and 54.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:27,101 INFO L168 Benchmark]: Boogie Preprocessor took 71.48 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,102 INFO L168 Benchmark]: RCFGBuilder took 3402.45 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 43.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,103 INFO L168 Benchmark]: TraceAbstraction took 2629.29 ms. Allocated memory is still 73.4 MB. Free memory was 43.3 MB in the beginning and 38.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,103 INFO L168 Benchmark]: Witness Printer took 52.00 ms. Allocated memory is still 73.4 MB. Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:27,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.95 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.6 MB in the beginning and 56.2 MB in the end (delta: -26.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 73.4 MB. Free memory was 56.2 MB in the beginning and 54.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.48 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3402.45 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 43.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2629.29 ms. Allocated memory is still 73.4 MB. Free memory was 43.3 MB in the beginning and 38.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Witness Printer took 52.00 ms. Allocated memory is still 73.4 MB. Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, 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: 12 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=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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 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! [2021-10-28 08:49:27,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2549daf4-74f3-4b9f-bb4c-536b9b58155f/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...