./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/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_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ................................................................................................................................................................................................................................................................................... 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_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/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_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 .............................................................................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2021-10-11 00:24:13,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:24:13,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:24:13,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:24:13,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:24:13,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:24:13,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:24:13,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:24:13,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:24:13,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:24:13,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:24:13,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:24:13,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:24:13,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:24:13,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:24:13,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:24:13,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:24:13,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:24:13,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:24:13,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:24:13,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:24:13,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:24:13,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:24:13,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:24:13,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:24:13,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:24:13,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:24:13,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:24:13,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:24:13,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:24:13,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:24:13,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:24:13,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:24:13,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:24:13,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:24:13,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:24:13,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:24:13,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:24:13,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:24:13,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:24:13,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:24:13,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:24:13,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:24:13,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:24:13,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:24:13,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:24:13,288 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:24:13,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:24:13,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:24:13,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:24:13,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:24:13,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:24:13,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:24:13,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:24:13,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:24:13,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:24:13,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:24:13,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:24:13,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:24:13,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:24:13,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:24:13,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:24:13,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:13,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:24:13,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:24:13,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:24:13,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:24:13,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:24:13,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:24:13,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:24:13,296 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_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-11 00:24:13,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:24:13,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:24:13,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:24:13,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:24:13,629 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:24:13,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 00:24:13,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/a856d96e3/92b95874fb024a54a0ea003ceb5c7663/FLAG39fa4d093 [2021-10-11 00:24:14,272 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:24:14,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 00:24:14,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/a856d96e3/92b95874fb024a54a0ea003ceb5c7663/FLAG39fa4d093 [2021-10-11 00:24:14,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/a856d96e3/92b95874fb024a54a0ea003ceb5c7663 [2021-10-11 00:24:14,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:24:14,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:24:14,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:14,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:24:14,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:24:14,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:14,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6258dcc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14, skipping insertion in model container [2021-10-11 00:24:14,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:14,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:24:14,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:24:14,882 WARN L226 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_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 00:24:14,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:14,910 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:24:14,925 WARN L226 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_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 00:24:14,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:14,949 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:24:14,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14 WrapperNode [2021-10-11 00:24:14,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:14,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:14,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:24:14,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:24:14,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:14,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:14,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:14,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:24:14,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:24:14,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:24:15,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... [2021-10-11 00:24:15,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:24:15,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:24:15,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:24:15,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:24:15,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:24:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:24:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:24:15,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:24:15,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:24:15,326 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:24:15,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:15 BoogieIcfgContainer [2021-10-11 00:24:15,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:24:15,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:24:15,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:24:15,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:24:15,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:24:14" (1/3) ... [2021-10-11 00:24:15,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d38dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:15, skipping insertion in model container [2021-10-11 00:24:15,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:14" (2/3) ... [2021-10-11 00:24:15,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d38dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:15, skipping insertion in model container [2021-10-11 00:24:15,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:15" (3/3) ... [2021-10-11 00:24:15,344 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-11 00:24:15,366 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:24:15,370 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:24:15,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:24:15,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:24:15,413 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:24:15,413 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:24:15,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:24:15,413 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:24:15,414 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:24:15,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:24:15,414 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:24:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 00:24:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:24:15,435 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:15,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:24:15,437 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-11 00:24:15,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:15,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67539241] [2021-10-11 00:24:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:15,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67539241] [2021-10-11 00:24:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:24:15,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:24:15,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680311171] [2021-10-11 00:24:15,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:24:15,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:24:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:24:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:24:15,627 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-10-11 00:24:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:15,646 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 00:24:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:24:15,647 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:24:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:15,657 INFO L225 Difference]: With dead ends: 20 [2021-10-11 00:24:15,657 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 00:24:15,660 INFO L677 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 [2021-10-11 00:24:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 00:24:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 00:24:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:24:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 00:24:15,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-11 00:24:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:15,698 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 00:24:15,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:24:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 00:24:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 00:24:15,699 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:15,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:15,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:24:15,700 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-11 00:24:15,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:24:15,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329972898] [2021-10-11 00:24:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:24:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:24:15,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:24:15,765 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:15,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:24:15,790 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:24:15,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:24:15,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:24:15 BoogieIcfgContainer [2021-10-11 00:24:15,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:24:15,817 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:24:15,818 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:24:15,818 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:24:15,818 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:15" (3/4) ... [2021-10-11 00:24:15,822 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:24:15,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:24:15,825 INFO L168 Benchmark]: Toolchain (without parser) took 1182.02 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 49.6 MB in the end (delta: 24.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:15,826 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 83.5 MB in the beginning and 83.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:15,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.67 ms. Allocated memory is still 111.1 MB. Free memory was 74.1 MB in the beginning and 84.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:15,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.13 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:15,829 INFO L168 Benchmark]: Boogie Preprocessor took 26.57 ms. Allocated memory is still 111.1 MB. Free memory was 83.7 MB in the beginning and 82.7 MB in the end (delta: 917.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:15,830 INFO L168 Benchmark]: RCFGBuilder took 310.24 ms. Allocated memory is still 111.1 MB. Free memory was 82.7 MB in the beginning and 70.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:15,831 INFO L168 Benchmark]: TraceAbstraction took 486.28 ms. Allocated memory is still 111.1 MB. Free memory was 70.2 MB in the beginning and 50.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:15,832 INFO L168 Benchmark]: Witness Printer took 5.28 ms. Allocated memory is still 111.1 MB. Free memory was 50.2 MB in the beginning and 49.6 MB in the end (delta: 533.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:15,836 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 111.1 MB. Free memory was 83.5 MB in the beginning and 83.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.67 ms. Allocated memory is still 111.1 MB. Free memory was 74.1 MB in the beginning and 84.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.13 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.57 ms. Allocated memory is still 111.1 MB. Free memory was 83.7 MB in the beginning and 82.7 MB in the end (delta: 917.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.24 ms. Allocated memory is still 111.1 MB. Free memory was 82.7 MB in the beginning and 70.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 486.28 ms. Allocated memory is still 111.1 MB. Free memory was 70.2 MB in the beginning and 50.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.28 ms. Allocated memory is still 111.1 MB. Free memory was 50.2 MB in the beginning and 49.6 MB in the end (delta: 533.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 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, 25 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:24:18,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:24:18,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:24:18,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-11 00:24:18,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:24:18,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:24:18,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:24:18,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:24:18,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:24:18,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:24:18,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:24:18,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:24:18,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:24:18,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:24:18,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:24:18,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:24:18,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-11 00:24:18,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:24:18,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:24:18,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:24:18,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:24:18,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:24:18,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:24:18,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:24:18,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:24:18,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:24:18,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:24:18,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:24:18,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-11 00:24:18,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:24:18,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:24:18,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:24:18,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:24:18,936 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:24:18,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:24:18,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:24:18,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:24:18,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:24:18,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:24:18,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:24:18,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:24:18,939 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 00:24:18,939 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 00:24:18,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:24:18,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:24:18,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:24:18,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:24:18,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:24:18,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:24:18,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:24:18,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:18,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:24:18,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:24:18,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:24:18,942 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-11 00:24:18,942 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 00:24:18,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:24:18,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:24:18,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 00:24:18,943 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_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-11 00:24:19,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:24:19,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:24:19,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:24:19,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:24:19,364 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:24:19,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 00:24:19,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/fb4f6d6d7/dc49d13b89e04b5ab9bb55c6eacb5ae0/FLAGb6e5a3689 [2021-10-11 00:24:20,035 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:24:20,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 00:24:20,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/fb4f6d6d7/dc49d13b89e04b5ab9bb55c6eacb5ae0/FLAGb6e5a3689 [2021-10-11 00:24:20,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/data/fb4f6d6d7/dc49d13b89e04b5ab9bb55c6eacb5ae0 [2021-10-11 00:24:20,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:24:20,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:24:20,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:20,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:24:20,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:24:20,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fad8978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20, skipping insertion in model container [2021-10-11 00:24:20,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:24:20,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:24:20,576 WARN L226 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_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 00:24:20,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:20,604 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:24:20,642 WARN L226 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_5b383212-fba4-47cd-81f1-bde816fe6306/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 00:24:20,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:24:20,677 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:24:20,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20 WrapperNode [2021-10-11 00:24:20,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:24:20,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:20,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:24:20,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:24:20,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:24:20,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:24:20,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:24:20,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:24:20,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... [2021-10-11 00:24:20,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:24:20,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:24:20,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:24:20,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:24:20,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:24:20,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 00:24:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:24:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:24:20,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:24:25,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:24:25,165 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:24:25,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:25 BoogieIcfgContainer [2021-10-11 00:24:25,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:24:25,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:24:25,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:24:25,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:24:25,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:24:20" (1/3) ... [2021-10-11 00:24:25,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2679d063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:25, skipping insertion in model container [2021-10-11 00:24:25,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:24:20" (2/3) ... [2021-10-11 00:24:25,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2679d063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:24:25, skipping insertion in model container [2021-10-11 00:24:25,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:25" (3/3) ... [2021-10-11 00:24:25,187 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-11 00:24:25,213 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:24:25,216 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:24:25,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:24:25,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:24:25,248 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:24:25,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:24:25,249 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:24:25,249 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:24:25,249 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:24:25,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:24:25,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:24:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 00:24:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:24:25,266 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:25,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:24:25,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-11 00:24:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:24:25,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605760338] [2021-10-11 00:24:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 00:24:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:24:25,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 00:24:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:24:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:24:25,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:24:25,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605760338] [2021-10-11 00:24:25,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:24:25,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:24:25,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572437120] [2021-10-11 00:24:25,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:24:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:24:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:24:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:24:25,706 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-10-11 00:24:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:24:25,720 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 00:24:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:24:25,721 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:24:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:24:25,737 INFO L225 Difference]: With dead ends: 20 [2021-10-11 00:24:25,737 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 00:24:25,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:24:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 00:24:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 00:24:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:24:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 00:24:25,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-11 00:24:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:24:25,789 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 00:24:25,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:24:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 00:24:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 00:24:25,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:24:25,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:24:26,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 00:24:26,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:24:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:24:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-11 00:24:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:24:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142783775] [2021-10-11 00:24:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 00:24:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:24:26,580 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:24:27,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:24:27,206 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-11 00:24:27,207 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:24:27,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 00:24:27,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:24:27 BoogieIcfgContainer [2021-10-11 00:24:27,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:24:27,431 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:24:27,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:24:27,432 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:24:27,432 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:24:25" (3/4) ... [2021-10-11 00:24:27,434 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:24:27,477 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b383212-fba4-47cd-81f1-bde816fe6306/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:24:27,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:24:27,479 INFO L168 Benchmark]: Toolchain (without parser) took 7098.07 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.5 MB in the beginning and 34.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,480 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.39 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.3 MB in the beginning and 49.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,482 INFO L168 Benchmark]: Boogie Preprocessor took 27.67 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 46.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:24:27,483 INFO L168 Benchmark]: RCFGBuilder took 4422.74 ms. Allocated memory is still 67.1 MB. Free memory was 46.4 MB in the beginning and 47.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,483 INFO L168 Benchmark]: TraceAbstraction took 2262.90 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 36.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,484 INFO L168 Benchmark]: Witness Printer took 45.92 ms. Allocated memory is still 67.1 MB. Free memory was 36.7 MB in the beginning and 34.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:24:27,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.39 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.3 MB in the beginning and 49.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.67 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 46.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 4422.74 ms. Allocated memory is still 67.1 MB. Free memory was 46.4 MB in the beginning and 47.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2262.90 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 36.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.92 ms. Allocated memory is still 67.1 MB. Free memory was 36.7 MB in the beginning and 34.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 0.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 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 proved your program to be incorrect! Received shutdown request...