./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d3efc4d3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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-d3efc4d [2020-12-04 12:10:23,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-04 12:10:23,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-04 12:10:23,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-04 12:10:23,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-04 12:10:23,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-04 12:10:23,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-04 12:10:23,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-04 12:10:23,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-04 12:10:23,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-04 12:10:23,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-04 12:10:23,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-04 12:10:23,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-04 12:10:23,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-04 12:10:23,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-04 12:10:23,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-04 12:10:23,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-04 12:10:23,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-04 12:10:23,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-04 12:10:23,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-04 12:10:23,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-04 12:10:23,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-04 12:10:23,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-04 12:10:23,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-04 12:10:23,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-04 12:10:23,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-04 12:10:23,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-04 12:10:23,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-04 12:10:23,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-04 12:10:23,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-04 12:10:23,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-04 12:10:23,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-04 12:10:23,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-04 12:10:23,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-04 12:10:23,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-04 12:10:23,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-04 12:10:23,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-04 12:10:23,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-04 12:10:23,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-04 12:10:23,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-04 12:10:23,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-04 12:10:23,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-04 12:10:23,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-04 12:10:23,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-04 12:10:23,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-04 12:10:23,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-04 12:10:23,291 INFO L138 SettingsManager]: * Use SBE=true [2020-12-04 12:10:23,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-04 12:10:23,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-04 12:10:23,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-04 12:10:23,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-04 12:10:23,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-04 12:10:23,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-04 12:10:23,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-04 12:10:23,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-04 12:10:23,293 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-04 12:10:23,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-04 12:10:23,294 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-04 12:10:23,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-04 12:10:23,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-04 12:10:23,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-04 12:10:23,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-04 12:10:23,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-04 12:10:23,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-04 12:10:23,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-04 12:10:23,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-04 12:10:23,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-04 12:10:23,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-04 12:10:23,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-04 12:10:23,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-04 12:10:23,297 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-04 12:10:23,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-04 12:10:23,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-04 12:10:23,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-04 12:10:23,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-04 12:10:23,771 INFO L275 PluginConnector]: CDTParser initialized [2020-12-04 12:10:23,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-04 12:10:23,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4b552e2/d839c24341c7489f80ae15c3344fca32/FLAGd44b448ae [2020-12-04 12:10:24,655 INFO L306 CDTParser]: Found 1 translation units. [2020-12-04 12:10:24,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-04 12:10:24,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4b552e2/d839c24341c7489f80ae15c3344fca32/FLAGd44b448ae [2020-12-04 12:10:24,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4b552e2/d839c24341c7489f80ae15c3344fca32 [2020-12-04 12:10:24,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-04 12:10:25,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-04 12:10:25,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-04 12:10:25,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-04 12:10:25,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-04 12:10:25,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.12 12:10:24" (1/1) ... [2020-12-04 12:10:25,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4024dfc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25, skipping insertion in model container [2020-12-04 12:10:25,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.12 12:10:24" (1/1) ... [2020-12-04 12:10:25,047 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-04 12:10:25,091 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-04 12:10:25,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-04 12:10:25,283 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-04 12:10:25,296 INFO L212 MainTranslator]: Completed pre-run [2020-12-04 12:10:25,310 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-04 12:10:25,316 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-04 12:10:25,333 INFO L217 MainTranslator]: Completed translation [2020-12-04 12:10:25,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25 WrapperNode [2020-12-04 12:10:25,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-04 12:10:25,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-04 12:10:25,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-04 12:10:25,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-04 12:10:25,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-04 12:10:25,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-04 12:10:25,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-04 12:10:25,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-04 12:10:25,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... [2020-12-04 12:10:25,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-04 12:10:25,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-04 12:10:25,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-04 12:10:25,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-04 12:10:25,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-04 12:10:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-04 12:10:25,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-04 12:10:25,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-04 12:10:25,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-04 12:10:25,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-04 12:10:25,758 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-04 12:10:25,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:25 BoogieIcfgContainer [2020-12-04 12:10:25,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-04 12:10:25,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-04 12:10:25,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-04 12:10:25,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-04 12:10:25,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.12 12:10:24" (1/3) ... [2020-12-04 12:10:25,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6950dbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 12:10:25, skipping insertion in model container [2020-12-04 12:10:25,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:25" (2/3) ... [2020-12-04 12:10:25,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6950dbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 12:10:25, skipping insertion in model container [2020-12-04 12:10:25,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:25" (3/3) ... [2020-12-04 12:10:25,770 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-04 12:10:25,788 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-04 12:10:25,792 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-04 12:10:25,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-04 12:10:25,869 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-04 12:10:25,870 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-04 12:10:25,870 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-04 12:10:25,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-04 12:10:25,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-04 12:10:25,874 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-04 12:10:25,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-04 12:10:25,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-04 12:10:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-04 12:10:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-04 12:10:25,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-04 12:10:25,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-04 12:10:25,936 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-04 12:10:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-04 12:10:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-04 12:10:25,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-04 12:10:25,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100014602] [2020-12-04 12:10:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-04 12:10:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-04 12:10:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-04 12:10:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100014602] [2020-12-04 12:10:26,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-04 12:10:26,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-04 12:10:26,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568128070] [2020-12-04 12:10:26,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-04 12:10:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-04 12:10:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-04 12:10:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-04 12:10:26,202 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-04 12:10:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-04 12:10:26,222 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-04 12:10:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-04 12:10:26,224 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-04 12:10:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-04 12:10:26,235 INFO L225 Difference]: With dead ends: 20 [2020-12-04 12:10:26,235 INFO L226 Difference]: Without dead ends: 8 [2020-12-04 12:10:26,239 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 [2020-12-04 12:10:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-04 12:10:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-04 12:10:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-04 12:10:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-04 12:10:26,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-04 12:10:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-04 12:10:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-04 12:10:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-04 12:10:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-04 12:10:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-04 12:10:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-04 12:10:26,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-04 12:10:26,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-04 12:10:26,287 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-04 12:10:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-04 12:10:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-04 12:10:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-04 12:10:26,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598781311] [2020-12-04 12:10:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-04 12:10:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-04 12:10:26,326 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-04 12:10:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-04 12:10:26,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-04 12:10:26,397 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-04 12:10:26,397 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-04 12:10:26,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-04 12:10:26,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.12 12:10:26 BoogieIcfgContainer [2020-12-04 12:10:26,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-04 12:10:26,437 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-04 12:10:26,437 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-04 12:10:26,437 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-04 12:10:26,438 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:25" (3/4) ... [2020-12-04 12:10:26,443 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-04 12:10:26,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-04 12:10:26,449 INFO L168 Benchmark]: Toolchain (without parser) took 1444.90 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.3 MB in the beginning and 24.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:26,451 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 35.7 MB. Free memory was 22.0 MB in the beginning and 22.0 MB in the end (delta: 23.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-04 12:10:26,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.04 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 20.7 MB in the end (delta: 464.3 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:26,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.74 ms. Allocated memory is still 44.0 MB. Free memory was 20.7 MB in the beginning and 19.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-04 12:10:26,455 INFO L168 Benchmark]: Boogie Preprocessor took 34.74 ms. Allocated memory is still 44.0 MB. Free memory was 19.3 MB in the beginning and 28.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:26,457 INFO L168 Benchmark]: RCFGBuilder took 346.14 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 24.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:26,459 INFO L168 Benchmark]: TraceAbstraction took 673.93 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 23.9 MB in the beginning and 24.6 MB in the end (delta: -692.9 kB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:26,461 INFO L168 Benchmark]: Witness Printer took 6.41 ms. Allocated memory is still 54.5 MB. Free memory was 24.6 MB in the beginning and 24.3 MB in the end (delta: 257.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-04 12:10:26,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 35.7 MB. Free memory was 22.0 MB in the beginning and 22.0 MB in the end (delta: 23.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.04 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 20.7 MB in the end (delta: 464.3 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.74 ms. Allocated memory is still 44.0 MB. Free memory was 20.7 MB in the beginning and 19.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.74 ms. Allocated memory is still 44.0 MB. Free memory was 19.3 MB in the beginning and 28.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 346.14 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 24.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 673.93 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 23.9 MB in the beginning and 24.6 MB in the end (delta: -692.9 kB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Witness Printer took 6.41 ms. Allocated memory is still 54.5 MB. Free memory was 24.6 MB in the beginning and 24.3 MB in the end (delta: 257.3 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 someBinaryArithmeticFLOAT_SMToperation at line 29, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 37. 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: 0.5s, 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-d3efc4d [2020-12-04 12:10:29,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-04 12:10:29,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-04 12:10:29,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-04 12:10:29,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-04 12:10:29,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-04 12:10:29,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-04 12:10:29,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-04 12:10:29,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-04 12:10:29,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-04 12:10:29,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-04 12:10:29,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-04 12:10:29,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-04 12:10:29,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-04 12:10:29,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-04 12:10:29,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-04 12:10:29,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-04 12:10:29,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-04 12:10:29,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-04 12:10:29,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-04 12:10:29,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-04 12:10:29,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-04 12:10:29,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-04 12:10:29,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-04 12:10:29,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-04 12:10:29,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-04 12:10:29,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-04 12:10:29,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-04 12:10:29,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-04 12:10:29,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-04 12:10:29,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-04 12:10:29,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-04 12:10:29,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-04 12:10:29,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-04 12:10:29,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-04 12:10:29,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-04 12:10:29,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-04 12:10:29,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-04 12:10:29,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-04 12:10:29,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-04 12:10:29,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-04 12:10:29,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-04 12:10:29,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-04 12:10:29,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-04 12:10:29,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-04 12:10:29,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-04 12:10:29,510 INFO L138 SettingsManager]: * Use SBE=true [2020-12-04 12:10:29,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-04 12:10:29,511 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-04 12:10:29,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-04 12:10:29,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-04 12:10:29,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-04 12:10:29,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-04 12:10:29,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-04 12:10:29,512 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-04 12:10:29,513 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-04 12:10:29,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-04 12:10:29,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-04 12:10:29,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-04 12:10:29,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-04 12:10:29,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-04 12:10:29,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-04 12:10:29,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-04 12:10:29,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-04 12:10:29,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-04 12:10:29,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-04 12:10:29,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-04 12:10:29,516 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-04 12:10:29,516 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-04 12:10:29,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-04 12:10:29,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-04 12:10:29,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-04 12:10:29,517 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-04 12:10:29,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-04 12:10:29,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-04 12:10:29,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-04 12:10:29,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-04 12:10:29,966 INFO L275 PluginConnector]: CDTParser initialized [2020-12-04 12:10:29,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-04 12:10:30,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84d0880a/3cdbb4ce484e4c08beda103bdb588c93/FLAG99d71039e [2020-12-04 12:10:30,764 INFO L306 CDTParser]: Found 1 translation units. [2020-12-04 12:10:30,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-04 12:10:30,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84d0880a/3cdbb4ce484e4c08beda103bdb588c93/FLAG99d71039e [2020-12-04 12:10:31,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b84d0880a/3cdbb4ce484e4c08beda103bdb588c93 [2020-12-04 12:10:31,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-04 12:10:31,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-04 12:10:31,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-04 12:10:31,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-04 12:10:31,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-04 12:10:31,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37049e5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31, skipping insertion in model container [2020-12-04 12:10:31,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,176 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-04 12:10:31,211 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-04 12:10:31,382 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-04 12:10:31,402 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-04 12:10:31,419 INFO L212 MainTranslator]: Completed pre-run [2020-12-04 12:10:31,434 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-04 12:10:31,441 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-04 12:10:31,463 INFO L217 MainTranslator]: Completed translation [2020-12-04 12:10:31,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31 WrapperNode [2020-12-04 12:10:31,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-04 12:10:31,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-04 12:10:31,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-04 12:10:31,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-04 12:10:31,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-04 12:10:31,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-04 12:10:31,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-04 12:10:31,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-04 12:10:31,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... [2020-12-04 12:10:31,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-04 12:10:31,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-04 12:10:31,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-04 12:10:31,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-04 12:10:31,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-04 12:10:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-04 12:10:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-04 12:10:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-04 12:10:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-04 12:10:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-04 12:10:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-04 12:10:36,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-04 12:10:36,113 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-04 12:10:36,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:36 BoogieIcfgContainer [2020-12-04 12:10:36,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-04 12:10:36,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-04 12:10:36,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-04 12:10:36,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-04 12:10:36,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.12 12:10:31" (1/3) ... [2020-12-04 12:10:36,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f83d2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 12:10:36, skipping insertion in model container [2020-12-04 12:10:36,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.12 12:10:31" (2/3) ... [2020-12-04 12:10:36,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f83d2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.12 12:10:36, skipping insertion in model container [2020-12-04 12:10:36,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:36" (3/3) ... [2020-12-04 12:10:36,129 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-04 12:10:36,144 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-04 12:10:36,147 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-04 12:10:36,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-04 12:10:36,187 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-04 12:10:36,187 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-04 12:10:36,187 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-04 12:10:36,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-04 12:10:36,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-04 12:10:36,188 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-04 12:10:36,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-04 12:10:36,188 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-04 12:10:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-04 12:10:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-04 12:10:36,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-04 12:10:36,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-04 12:10:36,209 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-04 12:10:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-04 12:10:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-04 12:10:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-04 12:10:36,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819196269] [2020-12-04 12:10:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-04 12:10:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-04 12:10:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-04 12:10:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-04 12:10:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-04 12:10:36,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-04 12:10:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-04 12:10:36,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819196269] [2020-12-04 12:10:36,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-04 12:10:36,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-04 12:10:36,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887360442] [2020-12-04 12:10:36,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-04 12:10:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-04 12:10:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-04 12:10:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-04 12:10:36,678 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-04 12:10:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-04 12:10:36,696 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-04 12:10:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-04 12:10:36,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-04 12:10:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-04 12:10:36,707 INFO L225 Difference]: With dead ends: 20 [2020-12-04 12:10:36,707 INFO L226 Difference]: Without dead ends: 8 [2020-12-04 12:10:36,710 INFO L677 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 [2020-12-04 12:10:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-04 12:10:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-04 12:10:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-04 12:10:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-04 12:10:36,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-04 12:10:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-04 12:10:36,746 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-04 12:10:36,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-04 12:10:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-04 12:10:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-04 12:10:36,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-04 12:10:36,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-04 12:10:36,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-04 12:10:36,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-04 12:10:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-04 12:10:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-04 12:10:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-04 12:10:36,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920824211] [2020-12-04 12:10:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-04 12:10:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-04 12:10:37,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-04 12:10:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-04 12:10:38,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-04 12:10:38,789 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-04 12:10:38,789 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-04 12:10:38,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-04 12:10:39,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.12 12:10:39 BoogieIcfgContainer [2020-12-04 12:10:39,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-04 12:10:39,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-04 12:10:39,027 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-04 12:10:39,027 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-04 12:10:39,028 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.12 12:10:36" (3/4) ... [2020-12-04 12:10:39,030 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-04 12:10:39,079 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-04 12:10:39,079 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-04 12:10:39,082 INFO L168 Benchmark]: Toolchain (without parser) took 7943.96 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.2 MB in the beginning and 35.7 MB in the end (delta: -13.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-04 12:10:39,082 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 26.7 MB in the beginning and 26.6 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-04 12:10:39,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.01 ms. Allocated memory is still 44.0 MB. Free memory was 22.0 MB in the beginning and 20.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,084 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.53 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 19.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,085 INFO L168 Benchmark]: Boogie Preprocessor took 43.32 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.0 MB in the beginning and 39.7 MB in the end (delta: -20.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,086 INFO L168 Benchmark]: RCFGBuilder took 4559.32 ms. Allocated memory is still 54.5 MB. Free memory was 39.7 MB in the beginning and 26.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,087 INFO L168 Benchmark]: TraceAbstraction took 2909.37 ms. Allocated memory is still 54.5 MB. Free memory was 25.7 MB in the beginning and 37.4 MB in the end (delta: -11.7 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,087 INFO L168 Benchmark]: Witness Printer took 52.54 ms. Allocated memory is still 54.5 MB. Free memory was 37.4 MB in the beginning and 35.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-04 12:10:39,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 26.7 MB in the beginning and 26.6 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.01 ms. Allocated memory is still 44.0 MB. Free memory was 22.0 MB in the beginning and 20.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.53 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 19.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.32 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.0 MB in the beginning and 39.7 MB in the end (delta: -20.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4559.32 ms. Allocated memory is still 54.5 MB. Free memory was 39.7 MB in the beginning and 26.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2909.37 ms. Allocated memory is still 54.5 MB. Free memory was 25.7 MB in the beginning and 37.4 MB in the end (delta: -11.7 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. * Witness Printer took 52.54 ms. Allocated memory is still 54.5 MB. Free memory was 37.4 MB in the beginning and 35.7 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: - 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] EXPR 1.0 [L21] float exp = 1.0 ; [L22] EXPR 1.0 [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] EXPR 1-x [L24] EXPR 1/(1-x) [L24] EXPR 2*(1/(1-x)) [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] EXPR x/count [L29] EXPR term * (x/count) [L29] term = term * (x/count) [L30] EXPR exp + term [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: 2.8s, 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, 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, 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, 1.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 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! Received shutdown request...