./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/inv_square-1.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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................................................... 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/inv_square-1.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 53d53b1526e829d58326d87a7aff591d9debe20f ....................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 23:31:25,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 23:31:25,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 23:31:25,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 23:31:25,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 23:31:25,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 23:31:25,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 23:31:25,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 23:31:25,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 23:31:25,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 23:31:25,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 23:31:25,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 23:31:25,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 23:31:25,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 23:31:25,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 23:31:25,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 23:31:25,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 23:31:25,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 23:31:25,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 23:31:25,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 23:31:25,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 23:31:25,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 23:31:25,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 23:31:25,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 23:31:25,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 23:31:25,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 23:31:25,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 23:31:25,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 23:31:25,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 23:31:25,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 23:31:25,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 23:31:25,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 23:31:25,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 23:31:25,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 23:31:25,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 23:31:25,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 23:31:25,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 23:31:25,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 23:31:25,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 23:31:25,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 23:31:25,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 23:31:25,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 23:31:25,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 23:31:25,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 23:31:25,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 23:31:25,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 23:31:25,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 23:31:25,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 23:31:25,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 23:31:25,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 23:31:25,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 23:31:25,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 23:31:25,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 23:31:25,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 23:31:25,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 23:31:25,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-07-04 23:31:26,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 23:31:26,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 23:31:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 23:31:26,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 23:31:26,024 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 23:31:26,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-07-04 23:31:26,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347b59807/08d5b192f4c24b2d97aed6372eeecb01/FLAG168140fcf [2021-07-04 23:31:26,430 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 23:31:26,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-07-04 23:31:26,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347b59807/08d5b192f4c24b2d97aed6372eeecb01/FLAG168140fcf [2021-07-04 23:31:26,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347b59807/08d5b192f4c24b2d97aed6372eeecb01 [2021-07-04 23:31:26,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 23:31:26,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 23:31:26,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 23:31:26,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 23:31:26,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 23:31:26,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:26,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d880059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26, skipping insertion in model container [2021-07-04 23:31:26,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:26,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 23:31:26,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 23:31:26,957 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-07-04 23:31:26,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 23:31:26,968 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 23:31:26,975 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-07-04 23:31:26,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 23:31:26,985 INFO L208 MainTranslator]: Completed translation [2021-07-04 23:31:26,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26 WrapperNode [2021-07-04 23:31:26,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 23:31:26,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 23:31:26,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 23:31:26,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 23:31:26,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 23:31:27,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 23:31:27,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 23:31:27,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 23:31:27,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 23:31:27,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 23:31:27,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 23:31:27,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 23:31:27,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (1/1) ... [2021-07-04 23:31:27,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 23:31:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 23:31:27,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-04 23:31:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-04 23:31:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 23:31:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 23:31:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 23:31:27,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 23:31:27,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 23:31:27,298 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-04 23:31:27,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:27 BoogieIcfgContainer [2021-07-04 23:31:27,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 23:31:27,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 23:31:27,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 23:31:27,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 23:31:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 11:31:26" (1/3) ... [2021-07-04 23:31:27,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afdcdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:31:27, skipping insertion in model container [2021-07-04 23:31:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:26" (2/3) ... [2021-07-04 23:31:27,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afdcdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:31:27, skipping insertion in model container [2021-07-04 23:31:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:27" (3/3) ... [2021-07-04 23:31:27,303 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-07-04 23:31:27,307 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 23:31:27,308 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 23:31:27,334 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 23:31:27,339 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 23:31:27,339 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 23:31:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 23:31:27,352 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 23:31:27,352 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 23:31:27,353 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 23:31:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 23:31:27,357 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-07-04 23:31:27,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 23:31:27,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002506102] [2021-07-04 23:31:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 23:31:27,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 23:31:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 23:31:27,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:27,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:27,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:27,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 23:31:27,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 23:31:27,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002506102] [2021-07-04 23:31:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002506102] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 23:31:27,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 23:31:27,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-04 23:31:27,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884996559] [2021-07-04 23:31:27,469 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-04 23:31:27,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 23:31:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-04 23:31:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 23:31:27,478 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 23:31:27,486 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-07-04 23:31:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-04 23:31:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-04 23:31:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 23:31:27,491 INFO L225 Difference]: With dead ends: 21 [2021-07-04 23:31:27,492 INFO L226 Difference]: Without dead ends: 7 [2021-07-04 23:31:27,493 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 23:31:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-07-04 23:31:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-07-04 23:31:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-07-04 23:31:27,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-07-04 23:31:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 23:31:27,521 INFO L442 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-07-04 23:31:27,522 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-07-04 23:31:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 23:31:27,522 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 23:31:27,523 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 23:31:27,523 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 23:31:27,526 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 23:31:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 23:31:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-07-04 23:31:27,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 23:31:27,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125572618] [2021-07-04 23:31:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 23:31:27,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 23:31:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 23:31:27,544 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 23:31:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 23:31:27,556 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 23:31:27,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-04 23:31:27,578 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 23:31:27,581 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 23:31:27,581 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 23:31:27,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 11:31:27 BoogieIcfgContainer [2021-07-04 23:31:27,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 23:31:27,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 23:31:27,601 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 23:31:27,601 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 23:31:27,602 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:27" (3/4) ... [2021-07-04 23:31:27,604 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-07-04 23:31:27,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 23:31:27,605 INFO L168 Benchmark]: Toolchain (without parser) took 741.08 ms. Allocated memory is still 71.3 MB. Free memory was 53.2 MB in the beginning and 43.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:27,606 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:27,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.27 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 43.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:27,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.52 ms. Allocated memory is still 71.3 MB. Free memory was 43.5 MB in the beginning and 54.7 MB in the end (delta: -11.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:27,611 INFO L168 Benchmark]: Boogie Preprocessor took 22.08 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:27,612 INFO L168 Benchmark]: RCFGBuilder took 235.69 ms. Allocated memory is still 71.3 MB. Free memory was 53.6 MB in the beginning and 42.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:27,613 INFO L168 Benchmark]: TraceAbstraction took 299.73 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 44.2 MB in the end (delta: -2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:27,613 INFO L168 Benchmark]: Witness Printer took 3.09 ms. Allocated memory is still 71.3 MB. Free memory was 44.2 MB in the beginning and 43.8 MB in the end (delta: 368.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:27,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 121.27 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 43.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.52 ms. Allocated memory is still 71.3 MB. Free memory was 43.5 MB in the beginning and 54.7 MB in the end (delta: -11.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.08 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 235.69 ms. Allocated memory is still 71.3 MB. Free memory was 53.6 MB in the beginning and 42.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 299.73 ms. Allocated memory is still 71.3 MB. Free memory was 41.9 MB in the beginning and 44.2 MB in the end (delta: -2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.09 ms. Allocated memory is still 71.3 MB. Free memory was 44.2 MB in the beginning and 43.8 MB in the end (delta: 368.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 250.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.0ms, AutomataDifference: 23.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.2ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.3ms SsaConstructionTime, 27.7ms SatisfiabilityAnalysisTime, 24.1ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-07-04 23:31:27,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 23:31:29,196 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-07-04 23:31:29,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 23:31:29,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 23:31:29,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 23:31:29,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 23:31:29,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 23:31:29,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 23:31:29,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 23:31:29,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 23:31:29,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 23:31:29,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 23:31:29,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 23:31:29,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-07-04 23:31:29,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 23:31:29,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 23:31:29,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 23:31:29,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 23:31:29,267 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 23:31:29,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 23:31:29,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 23:31:29,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 23:31:29,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 23:31:29,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 23:31:29,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 23:31:29,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 23:31:29,268 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-07-04 23:31:29,268 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-07-04 23:31:29,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 23:31:29,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 23:31:29,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 23:31:29,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 23:31:29,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 23:31:29,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 23:31:29,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 23:31:29,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 23:31:29,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 23:31:29,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 23:31:29,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 23:31:29,271 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-07-04 23:31:29,271 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-07-04 23:31:29,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 23:31:29,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 23:31:29,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-07-04 23:31:29,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-07-04 23:31:29,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 23:31:29,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 23:31:29,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 23:31:29,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 23:31:29,516 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 23:31:29,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-07-04 23:31:29,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caee3bfd8/d79dc2bc21144a7eb3c5c3a7157dc317/FLAGd58280b44 [2021-07-04 23:31:29,924 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 23:31:29,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-07-04 23:31:29,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caee3bfd8/d79dc2bc21144a7eb3c5c3a7157dc317/FLAGd58280b44 [2021-07-04 23:31:29,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caee3bfd8/d79dc2bc21144a7eb3c5c3a7157dc317 [2021-07-04 23:31:29,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 23:31:29,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 23:31:29,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 23:31:29,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 23:31:29,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 23:31:29,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:31:29" (1/1) ... [2021-07-04 23:31:29,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368146b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:29, skipping insertion in model container [2021-07-04 23:31:29,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 11:31:29" (1/1) ... [2021-07-04 23:31:29,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 23:31:29,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 23:31:30,091 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-07-04 23:31:30,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 23:31:30,112 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 23:31:30,127 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-07-04 23:31:30,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 23:31:30,157 INFO L208 MainTranslator]: Completed translation [2021-07-04 23:31:30,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30 WrapperNode [2021-07-04 23:31:30,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 23:31:30,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 23:31:30,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 23:31:30,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 23:31:30,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 23:31:30,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 23:31:30,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 23:31:30,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 23:31:30,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 23:31:30,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 23:31:30,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 23:31:30,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 23:31:30,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (1/1) ... [2021-07-04 23:31:30,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 23:31:30,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 23:31:30,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-04 23:31:30,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-04 23:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-07-04 23:31:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 23:31:30,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 23:31:30,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 23:31:31,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 23:31:31,003 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-04 23:31:31,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:31 BoogieIcfgContainer [2021-07-04 23:31:31,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 23:31:31,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 23:31:31,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 23:31:31,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 23:31:31,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 11:31:29" (1/3) ... [2021-07-04 23:31:31,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdf8826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:31:31, skipping insertion in model container [2021-07-04 23:31:31,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 11:31:30" (2/3) ... [2021-07-04 23:31:31,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdf8826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 11:31:31, skipping insertion in model container [2021-07-04 23:31:31,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:31" (3/3) ... [2021-07-04 23:31:31,016 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-07-04 23:31:31,021 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 23:31:31,021 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 23:31:31,049 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 23:31:31,054 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 23:31:31,055 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 23:31:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 23:31:31,066 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 23:31:31,066 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 23:31:31,067 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 23:31:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 23:31:31,071 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-07-04 23:31:31,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-07-04 23:31:31,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603778079] [2021-07-04 23:31:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 23:31:31,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-07-04 23:31:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-07-04 23:31:31,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-07-04 23:31:31,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-07-04 23:31:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 23:31:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-07-04 23:31:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-04 23:31:31,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,258 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 23:31:31,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-07-04 23:31:31,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,287 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 23:31:31,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 23:31:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 23:31:31,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-07-04 23:31:31,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603778079] [2021-07-04 23:31:31,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603778079] provided 2 perfect and 0 imperfect interpolant sequences [2021-07-04 23:31:31,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-07-04 23:31:31,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-07-04 23:31:31,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659791541] [2021-07-04 23:31:31,303 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-04 23:31:31,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-07-04 23:31:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-04 23:31:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 23:31:31,321 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 23:31:31,331 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-07-04 23:31:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-04 23:31:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-04 23:31:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 23:31:31,343 INFO L225 Difference]: With dead ends: 21 [2021-07-04 23:31:31,343 INFO L226 Difference]: Without dead ends: 7 [2021-07-04 23:31:31,345 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 23:31:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-07-04 23:31:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-07-04 23:31:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-07-04 23:31:31,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-07-04 23:31:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 23:31:31,365 INFO L442 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-07-04 23:31:31,366 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 23:31:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-07-04 23:31:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 23:31:31,366 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 23:31:31,366 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 23:31:31,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-07-04 23:31:31,577 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-07-04 23:31:31,578 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 23:31:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 23:31:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-07-04 23:31:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-07-04 23:31:31,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160741958] [2021-07-04 23:31:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 23:31:31,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-07-04 23:31:31,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-07-04 23:31:31,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-07-04 23:31:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-07-04 23:31:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 23:31:31,650 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 23:31:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 23:31:31,697 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 23:31:31,716 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-07-04 23:31:31,717 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 23:31:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-07-04 23:31:31,919 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-07-04 23:31:31,920 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 23:31:31,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 11:31:31 BoogieIcfgContainer [2021-07-04 23:31:31,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 23:31:31,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 23:31:31,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 23:31:31,947 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 23:31:31,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 11:31:31" (3/4) ... [2021-07-04 23:31:31,949 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-04 23:31:31,983 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 23:31:31,983 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 23:31:31,984 INFO L168 Benchmark]: Toolchain (without parser) took 2035.98 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 44.0 MB in the beginning and 35.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:31,984 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 62.9 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:31,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.83 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 46.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:31,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:31,985 INFO L168 Benchmark]: Boogie Preprocessor took 14.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 43.7 MB in the end (delta: 974.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 23:31:31,989 INFO L168 Benchmark]: RCFGBuilder took 808.35 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 31.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:31,990 INFO L168 Benchmark]: TraceAbstraction took 941.12 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 31.3 MB in the beginning and 36.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:31,990 INFO L168 Benchmark]: Witness Printer took 36.09 ms. Allocated memory is still 79.7 MB. Free memory was 36.7 MB in the beginning and 35.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 23:31:31,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 62.9 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 207.83 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 46.3 MB in the end (delta: -2.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 43.7 MB in the end (delta: 974.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 808.35 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 31.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 941.12 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 31.3 MB in the beginning and 36.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Witness Printer took 36.09 ms. Allocated memory is still 79.7 MB. Free memory was 36.7 MB in the beginning and 35.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 874.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.5ms, AutomataDifference: 41.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 35.2ms SsaConstructionTime, 102.5ms SatisfiabilityAnalysisTime, 78.3ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-07-04 23:31:32,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...