./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/float_int_inv_square.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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 ../sv-benchmarks/c/float-benchs/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ........................................................................................................................................................................................................................................................................... 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 ../sv-benchmarks/c/float-benchs/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ....................................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-25 21:38:04,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:38:04,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:38:04,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:38:04,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:38:04,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:38:04,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:38:04,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:38:04,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:38:04,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:38:04,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:38:04,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:38:04,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:38:04,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:38:04,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:38:04,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:38:04,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:38:04,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:38:04,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:38:04,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:38:04,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:38:04,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:38:04,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:38:04,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:38:04,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:38:04,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:38:04,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:38:04,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:38:04,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:38:04,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:38:04,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:38:04,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:38:04,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:38:04,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:38:04,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:38:04,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:38:04,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:38:04,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:38:04,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:38:04,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:38:04,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:38:04,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 21:38:04,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:38:04,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:38:04,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:38:04,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:38:04,983 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:38:04,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:38:04,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:38:04,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 21:38:04,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:38:04,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:38:04,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:38:04,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:38:04,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:38:04,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:38:04,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:38:04,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:38:04,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:38:04,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:38:04,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:38:04,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:38:04,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:38:04,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:38:04,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:38:04,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:38:04,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:38:04,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 21:38:04,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 21:38:04,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:38:04,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:38:04,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-25 21:38:05,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:38:05,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:38:05,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:38:05,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:38:05,460 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:38:05,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-25 21:38:05,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15052a3b7/2bea235ae0e440bf8a0a6564537dd14f/FLAG29a1ac602 [2020-10-25 21:38:06,190 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:38:06,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-25 21:38:06,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15052a3b7/2bea235ae0e440bf8a0a6564537dd14f/FLAG29a1ac602 [2020-10-25 21:38:06,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15052a3b7/2bea235ae0e440bf8a0a6564537dd14f [2020-10-25 21:38:06,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:38:06,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:38:06,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:38:06,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:38:06,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:38:06,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@303a0bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06, skipping insertion in model container [2020-10-25 21:38:06,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:38:06,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:38:06,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:38:06,805 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:38:06,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:38:06,839 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:38:06,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06 WrapperNode [2020-10-25 21:38:06,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:38:06,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:38:06,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:38:06,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:38:06,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:38:06,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:38:06,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:38:06,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:38:06,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (1/1) ... [2020-10-25 21:38:06,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:38:06,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:38:06,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:38:06,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:38:06,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (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 [2020-10-25 21:38:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 21:38:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:38:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:38:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:38:07,317 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:38:07,318 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 21:38:07,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:07 BoogieIcfgContainer [2020-10-25 21:38:07,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:38:07,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:38:07,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:38:07,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:38:07,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:38:06" (1/3) ... [2020-10-25 21:38:07,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb7b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:38:07, skipping insertion in model container [2020-10-25 21:38:07,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:06" (2/3) ... [2020-10-25 21:38:07,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb7b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:38:07, skipping insertion in model container [2020-10-25 21:38:07,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:07" (3/3) ... [2020-10-25 21:38:07,331 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-25 21:38:07,345 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:38:07,351 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:38:07,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:38:07,398 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:38:07,399 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:38:07,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:38:07,399 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:38:07,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:38:07,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:38:07,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:38:07,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:38:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:38:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:38:07,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:38:07,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:38:07,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:38:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:38:07,443 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-25 21:38:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:38:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621234045] [2020-10-25 21:38:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:38:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:38:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:38:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621234045] [2020-10-25 21:38:07,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:38:07,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 21:38:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413951759] [2020-10-25 21:38:07,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:38:07,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:38:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:38:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:38:07,654 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:38:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:38:07,671 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-25 21:38:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:38:07,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-25 21:38:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:38:07,684 INFO L225 Difference]: With dead ends: 20 [2020-10-25 21:38:07,685 INFO L226 Difference]: Without dead ends: 7 [2020-10-25 21:38:07,689 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 [2020-10-25 21:38:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-25 21:38:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-25 21:38:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-25 21:38:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-25 21:38:07,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-25 21:38:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:38:07,729 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-25 21:38:07,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:38:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-25 21:38:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:38:07,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:38:07,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:38:07,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 21:38:07,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:38:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:38:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-25 21:38:07,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:38:07,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679540761] [2020-10-25 21:38:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:38:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:38:07,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:38:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:38:07,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:38:07,836 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 21:38:07,837 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:38:07,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 21:38:07,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:38:07 BoogieIcfgContainer [2020-10-25 21:38:07,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:38:07,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:38:07,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:38:07,866 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:38:07,867 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:07" (3/4) ... [2020-10-25 21:38:07,872 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 21:38:07,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:38:07,876 INFO L168 Benchmark]: Toolchain (without parser) took 1314.23 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.2 MB in the beginning and 39.1 MB in the end (delta: -13.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:07,877 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 39.8 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 31.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:07,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.50 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 26.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:07,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 48.2 MB. Free memory was 26.4 MB in the beginning and 25.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:07,880 INFO L168 Benchmark]: Boogie Preprocessor took 22.41 ms. Allocated memory is still 48.2 MB. Free memory was 25.0 MB in the beginning and 24.1 MB in the end (delta: 971.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:07,881 INFO L168 Benchmark]: RCFGBuilder took 417.25 ms. Allocated memory is still 48.2 MB. Free memory was 23.9 MB in the beginning and 25.1 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:07,883 INFO L168 Benchmark]: TraceAbstraction took 542.20 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.7 MB in the beginning and 39.4 MB in the end (delta: -14.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:07,884 INFO L168 Benchmark]: Witness Printer took 6.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.1 MB in the end (delta: 324.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:07,889 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 39.8 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 31.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.50 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 26.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 48.2 MB. Free memory was 26.4 MB in the beginning and 25.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.41 ms. Allocated memory is still 48.2 MB. Free memory was 25.0 MB in the beginning and 24.1 MB in the end (delta: 971.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.25 ms. Allocated memory is still 48.2 MB. Free memory was 23.9 MB in the beginning and 25.1 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 542.20 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.7 MB in the beginning and 39.4 MB in the end (delta: -14.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.1 MB in the end (delta: 324.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 12 NumberOfCodeBlocks, 12 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 0.2.0-5485861 [2020-10-25 21:38:10,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:38:10,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:38:10,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:38:10,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:38:10,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:38:10,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:38:10,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:38:10,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:38:10,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:38:10,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:38:10,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:38:10,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:38:10,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:38:10,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:38:10,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:38:10,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:38:10,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:38:10,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:38:10,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:38:10,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:38:10,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:38:10,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:38:10,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:38:10,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:38:10,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:38:10,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:38:10,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:38:10,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:38:10,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:38:10,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:38:10,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:38:10,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:38:10,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:38:10,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:38:10,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:38:10,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:38:10,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:38:10,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:38:10,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:38:10,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:38:10,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 21:38:10,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:38:10,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:38:10,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:38:10,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:38:10,834 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:38:10,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:38:10,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:38:10,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:38:10,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:38:10,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:38:10,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:38:10,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:38:10,837 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 21:38:10,837 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 21:38:10,837 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:38:10,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:38:10,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:38:10,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:38:10,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:38:10,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:38:10,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:38:10,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:38:10,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:38:10,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:38:10,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:38:10,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:38:10,840 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 21:38:10,841 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 21:38:10,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:38:10,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:38:10,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 21:38:10,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-25 21:38:11,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:38:11,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:38:11,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:38:11,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:38:11,316 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:38:11,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-25 21:38:11,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac35f1718/c3c473ba40fd4cf7b2d0de973d55b506/FLAG953308e5d [2020-10-25 21:38:11,985 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:38:11,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-25 21:38:11,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac35f1718/c3c473ba40fd4cf7b2d0de973d55b506/FLAG953308e5d [2020-10-25 21:38:12,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac35f1718/c3c473ba40fd4cf7b2d0de973d55b506 [2020-10-25 21:38:12,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:38:12,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:38:12,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:38:12,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:38:12,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:38:12,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ecac131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12, skipping insertion in model container [2020-10-25 21:38:12,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:38:12,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:38:12,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:38:12,685 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:38:12,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:38:12,732 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:38:12,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12 WrapperNode [2020-10-25 21:38:12,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:38:12,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:38:12,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:38:12,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:38:12,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:38:12,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:38:12,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:38:12,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:38:12,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (1/1) ... [2020-10-25 21:38:12,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:38:12,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:38:12,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:38:12,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:38:12,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (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 [2020-10-25 21:38:12,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 21:38:12,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:38:12,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:38:12,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:38:14,057 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:38:14,059 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 21:38:14,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:14 BoogieIcfgContainer [2020-10-25 21:38:14,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:38:14,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:38:14,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:38:14,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:38:14,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:38:12" (1/3) ... [2020-10-25 21:38:14,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cdfd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:38:14, skipping insertion in model container [2020-10-25 21:38:14,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:38:12" (2/3) ... [2020-10-25 21:38:14,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cdfd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:38:14, skipping insertion in model container [2020-10-25 21:38:14,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:14" (3/3) ... [2020-10-25 21:38:14,097 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-25 21:38:14,111 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:38:14,116 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:38:14,132 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:38:14,168 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:38:14,169 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:38:14,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:38:14,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:38:14,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:38:14,171 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:38:14,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:38:14,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:38:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:38:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:38:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:38:14,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:38:14,198 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:38:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:38:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-25 21:38:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:38:14,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790828828] [2020-10-25 21:38:14,223 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 [2020-10-25 21:38:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:38:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 21:38:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:38:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:38:14,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:38:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:38:14,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790828828] [2020-10-25 21:38:14,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:38:14,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 21:38:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935957031] [2020-10-25 21:38:14,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:38:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:38:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:38:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:38:14,447 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:38:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:38:14,466 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-25 21:38:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:38:14,468 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-25 21:38:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:38:14,478 INFO L225 Difference]: With dead ends: 20 [2020-10-25 21:38:14,479 INFO L226 Difference]: Without dead ends: 7 [2020-10-25 21:38:14,482 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 [2020-10-25 21:38:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-25 21:38:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-25 21:38:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-25 21:38:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-25 21:38:14,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-25 21:38:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:38:14,522 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-25 21:38:14,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:38:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-25 21:38:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:38:14,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:38:14,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:38:14,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 21:38:14,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:38:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:38:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-25 21:38:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:38:14,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414181183] [2020-10-25 21:38:14,743 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 [2020-10-25 21:38:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:38:14,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:38:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:38:15,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:38:15,044 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 21:38:15,044 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:38:15,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 21:38:15,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:38:15 BoogieIcfgContainer [2020-10-25 21:38:15,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:38:15,279 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:38:15,279 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:38:15,280 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:38:15,280 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:38:14" (3/4) ... [2020-10-25 21:38:15,283 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 21:38:15,344 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 21:38:15,344 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:38:15,347 INFO L168 Benchmark]: Toolchain (without parser) took 2977.81 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 15.6 MB in the beginning and 28.3 MB in the end (delta: -12.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:15,347 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 37.7 MB. Free memory was 22.9 MB in the beginning and 22.9 MB in the end (delta: 35.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:15,348 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.73 ms. Allocated memory is still 37.7 MB. Free memory was 14.9 MB in the beginning and 14.5 MB in the end (delta: 459.1 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:15,349 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.48 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 14.4 MB in the beginning and 31.2 MB in the end (delta: -16.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:15,349 INFO L168 Benchmark]: Boogie Preprocessor took 74.15 ms. Allocated memory is still 46.1 MB. Free memory was 31.2 MB in the beginning and 30.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:15,350 INFO L168 Benchmark]: RCFGBuilder took 1183.44 ms. Allocated memory is still 46.1 MB. Free memory was 30.0 MB in the beginning and 19.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:15,351 INFO L168 Benchmark]: TraceAbstraction took 1194.50 ms. Allocated memory is still 46.1 MB. Free memory was 30.3 MB in the beginning and 29.9 MB in the end (delta: 402.0 kB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:38:15,351 INFO L168 Benchmark]: Witness Printer took 65.24 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 28.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:38:15,355 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 37.7 MB. Free memory was 22.9 MB in the beginning and 22.9 MB in the end (delta: 35.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.73 ms. Allocated memory is still 37.7 MB. Free memory was 14.9 MB in the beginning and 14.5 MB in the end (delta: 459.1 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.48 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 14.4 MB in the beginning and 31.2 MB in the end (delta: -16.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.15 ms. Allocated memory is still 46.1 MB. Free memory was 31.2 MB in the beginning and 30.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1183.44 ms. Allocated memory is still 46.1 MB. Free memory was 30.0 MB in the beginning and 19.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1194.50 ms. Allocated memory is still 46.1 MB. Free memory was 30.3 MB in the beginning and 29.9 MB in the end (delta: 402.0 kB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. * Witness Printer took 65.24 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 28.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...