./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ................................................................................................................................................................................................................................................................................. 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_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ............................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 00:41:20,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 00:41:20,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 00:41:20,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 00:41:20,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 00:41:20,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 00:41:20,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 00:41:20,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 00:41:20,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 00:41:20,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 00:41:20,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 00:41:20,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 00:41:20,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 00:41:20,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 00:41:20,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 00:41:20,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 00:41:20,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 00:41:20,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 00:41:20,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 00:41:20,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 00:41:20,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 00:41:20,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 00:41:20,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 00:41:20,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 00:41:20,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 00:41:20,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 00:41:20,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 00:41:20,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 00:41:20,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 00:41:20,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 00:41:20,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:41:20,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:41:20,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:41:20,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:41:20,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:41:20,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:41:20,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:41:20,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:41:20,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:41:20,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:41:20,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:41:20,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 00:41:20,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:41:20,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:41:20,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:41:20,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:41:20,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:41:20,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:41:20,708 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:41:20,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:41:20,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:41:20,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 00:41:20,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:41:20,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:41:20,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:41:20,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:41:20,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:41:20,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:41:20,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:41:20,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:41:20,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:41:20,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:41:20,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:41:20,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:41:20,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:20,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:41:20,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:41:20,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:41:20,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 00:41:20,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 00:41:20,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:41:20,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:41:20,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2021-08-26 00:41:21,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:41:21,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:41:21,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:41:21,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:41:21,038 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:41:21,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2021-08-26 00:41:21,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100b957b5/7de3630820ef4f45904305782514c9cf/FLAGdb4f8dcad [2021-08-26 00:41:21,540 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:41:21,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2021-08-26 00:41:21,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100b957b5/7de3630820ef4f45904305782514c9cf/FLAGdb4f8dcad [2021-08-26 00:41:21,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100b957b5/7de3630820ef4f45904305782514c9cf [2021-08-26 00:41:21,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:41:21,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:41:21,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:21,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:41:21,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:41:21,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a4bd42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21, skipping insertion in model container [2021-08-26 00:41:21,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:41:21,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:41:21,717 WARN L228 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_int.c[482,495] [2021-08-26 00:41:21,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:21,739 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:41:21,749 WARN L228 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_int.c[482,495] [2021-08-26 00:41:21,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:21,771 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:41:21,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21 WrapperNode [2021-08-26 00:41:21,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:21,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:21,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:41:21,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:41:21,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:21,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:41:21,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:41:21,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:41:21,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:41:21,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:41:21,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:41:21,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:41:21,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (1/1) ... [2021-08-26 00:41:21,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:41:21,874 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) [2021-08-26 00:41:21,904 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 [2021-08-26 00:41:21,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 00:41:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:41:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:41:21,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:41:22,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:41:22,150 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:41:22,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:22 BoogieIcfgContainer [2021-08-26 00:41:22,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:41:22,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:41:22,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:41:22,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:41:22,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:41:21" (1/3) ... [2021-08-26 00:41:22,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a720e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:22, skipping insertion in model container [2021-08-26 00:41:22,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:21" (2/3) ... [2021-08-26 00:41:22,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a720e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:22, skipping insertion in model container [2021-08-26 00:41:22,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:22" (3/3) ... [2021-08-26 00:41:22,160 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2021-08-26 00:41:22,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:41:22,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:41:22,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:41:22,227 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:41:22,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:41:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-08-26 00:41:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:22,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:22,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:22,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-08-26 00:41:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:41:22,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175759137] [2021-08-26 00:41:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:22,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:41:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:22,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 00:41:22,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175759137] [2021-08-26 00:41:22,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175759137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:22,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:22,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 00:41:22,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669994840] [2021-08-26 00:41:22,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:41:22,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 00:41:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:41:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:22,490 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-08-26 00:41:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:22,506 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-26 00:41:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:41:22,507 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 [2021-08-26 00:41:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:22,515 INFO L225 Difference]: With dead ends: 19 [2021-08-26 00:41:22,515 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:41:22,517 INFO L781 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 [2021-08-26 00:41:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:41:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:41:22,551 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) [2021-08-26 00:41:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:41:22,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:41:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:41:22,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:41:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:41:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:22,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:22,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 00:41:22,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-08-26 00:41:22,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:41:22,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567565502] [2021-08-26 00:41:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:22,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:41:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:41:22,620 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:41:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:41:22,662 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 00:41:22,662 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:41:22,664 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:41:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 00:41:22,671 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:41:22,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:41:22 BoogieIcfgContainer [2021-08-26 00:41:22,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:41:22,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:41:22,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:41:22,687 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:41:22,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:22" (3/4) ... [2021-08-26 00:41:22,690 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 00:41:22,690 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:41:22,692 INFO L168 Benchmark]: Toolchain (without parser) took 1118.76 ms. Allocated memory is still 60.8 MB. Free memory was 40.6 MB in the beginning and 24.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:22,692 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:22,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.34 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 43.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:22,694 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.62 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 42.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:22,694 INFO L168 Benchmark]: Boogie Preprocessor took 29.74 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 41.3 MB in the end (delta: 817.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:22,695 INFO L168 Benchmark]: RCFGBuilder took 305.67 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 30.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:22,695 INFO L168 Benchmark]: TraceAbstraction took 532.34 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 24.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:22,696 INFO L168 Benchmark]: Witness Printer took 3.62 ms. Allocated memory is still 60.8 MB. Free memory was 24.8 MB in the beginning and 24.6 MB in the end (delta: 252.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:22,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 201.34 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 43.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.62 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 42.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.74 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 41.3 MB in the end (delta: 817.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 305.67 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 30.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 532.34 ms. Allocated memory is still 60.8 MB. Free memory was 29.8 MB in the beginning and 24.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.62 ms. Allocated memory is still 60.8 MB. Free memory was 24.8 MB in the beginning and 24.6 MB in the end (delta: 252.1 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 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 456.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 13.8ms, AutomataDifference: 52.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 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=11occurred 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: 12.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.5ms SsaConstructionTime, 73.5ms SatisfiabilityAnalysisTime, 73.9ms 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 [2021-08-26 00:41:22,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 00:41:24,589 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-26 00:41:24,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:41:24,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:41:24,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:41:24,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:41:24,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:41:24,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:41:24,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:41:24,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:41:24,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:41:24,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:41:24,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:41:24,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 00:41:24,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:41:24,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:41:24,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:41:24,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:41:24,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:41:24,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:41:24,682 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:41:24,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:41:24,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:41:24,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 00:41:24,684 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 00:41:24,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:41:24,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:41:24,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:41:24,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:41:24,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:41:24,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:41:24,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:41:24,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:24,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:41:24,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:41:24,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:41:24,697 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 00:41:24,697 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 00:41:24,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:41:24,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:41:24,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 00:41:24,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2021-08-26 00:41:24,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:41:25,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:41:25,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:41:25,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:41:25,022 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:41:25,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2021-08-26 00:41:25,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf68514e/c14caae18858432581f4e693761f9f7a/FLAG31d208821 [2021-08-26 00:41:25,587 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:41:25,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2021-08-26 00:41:25,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf68514e/c14caae18858432581f4e693761f9f7a/FLAG31d208821 [2021-08-26 00:41:26,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf68514e/c14caae18858432581f4e693761f9f7a [2021-08-26 00:41:26,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:41:26,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:41:26,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:26,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:41:26,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:41:26,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3f4f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26, skipping insertion in model container [2021-08-26 00:41:26,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:41:26,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:41:26,188 WARN L228 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_int.c[482,495] [2021-08-26 00:41:26,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:26,208 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:41:26,219 WARN L228 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_int.c[482,495] [2021-08-26 00:41:26,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:26,240 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:41:26,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26 WrapperNode [2021-08-26 00:41:26,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:26,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:26,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:41:26,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:41:26,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:26,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:41:26,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:41:26,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:41:26,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:41:26,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:41:26,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:41:26,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:41:26,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (1/1) ... [2021-08-26 00:41:26,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:26,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:41:26,371 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) [2021-08-26 00:41:26,391 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 [2021-08-26 00:41:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 00:41:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:41:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:41:26,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:41:27,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:41:27,655 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:41:27,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:27 BoogieIcfgContainer [2021-08-26 00:41:27,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:41:27,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:41:27,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:41:27,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:41:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:41:26" (1/3) ... [2021-08-26 00:41:27,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0718df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:27, skipping insertion in model container [2021-08-26 00:41:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:26" (2/3) ... [2021-08-26 00:41:27,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0718df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:27, skipping insertion in model container [2021-08-26 00:41:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:27" (3/3) ... [2021-08-26 00:41:27,664 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2021-08-26 00:41:27,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:41:27,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:41:27,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:41:27,712 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:41:27,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:41:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-08-26 00:41:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:27,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:27,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:27,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-08-26 00:41:27,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:41:27,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974674132] [2021-08-26 00:41:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:27,752 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:41:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:41:27,758 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) [2021-08-26 00:41:27,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 00:41:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 00:41:27,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:41:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:27,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:41:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:27,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:41:27,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974674132] [2021-08-26 00:41:27,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974674132] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:27,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:27,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 00:41:27,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347007048] [2021-08-26 00:41:27,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:41:27,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:41:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:41:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:27,982 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-08-26 00:41:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:27,993 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-26 00:41:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:41:27,994 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 [2021-08-26 00:41:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:27,999 INFO L225 Difference]: With dead ends: 19 [2021-08-26 00:41:28,000 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:41:28,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:41:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:41:28,028 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) [2021-08-26 00:41:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:41:28,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:41:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:28,030 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:41:28,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:41:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:41:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:28,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:28,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:28,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 00:41:28,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:41:28,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-08-26 00:41:28,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:41:28,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378369551] [2021-08-26 00:41:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:28,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:41:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:41:28,246 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) [2021-08-26 00:41:28,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 00:41:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 00:41:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:41:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:41:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:37,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:41:37,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378369551] [2021-08-26 00:41:37,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378369551] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:37,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:37,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-26 00:41:37,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280285814] [2021-08-26 00:41:37,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 00:41:37,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:41:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 00:41:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 00:41:37,957 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-08-26 00:41:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:38,166 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-08-26 00:41:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 00:41:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 [2021-08-26 00:41:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:38,167 INFO L225 Difference]: With dead ends: 7 [2021-08-26 00:41:38,167 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 00:41:38,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2857.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 00:41:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 00:41:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 00:41:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-08-26 00:41:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 00:41:38,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-08-26 00:41:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:38,169 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 00:41:38,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-08-26 00:41:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 00:41:38,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 00:41:38,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:41:38,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 00:41:38,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:41:38,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 00:41:38,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 00:41:38,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 00:41:38,414 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 00:41:38,414 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 00:41:38,414 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 00:41:38,414 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 00:41:38,415 INFO L860 garLoopResultBuilder]: At program point L26(lines 15 27) the Hoare annotation is: true [2021-08-26 00:41:38,415 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-26 00:41:38,415 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-08-26 00:41:38,415 INFO L857 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-08-26 00:41:38,416 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-08-26 00:41:38,416 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-08-26 00:41:38,416 INFO L860 garLoopResultBuilder]: At program point L13-3(line 13) the Hoare annotation is: true [2021-08-26 00:41:38,420 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:41:38,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:41:38 BoogieIcfgContainer [2021-08-26 00:41:38,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:41:38,426 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:41:38,426 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:41:38,426 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:41:38,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:27" (3/4) ... [2021-08-26 00:41:38,429 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 00:41:38,438 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 00:41:38,438 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 00:41:38,438 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 00:41:38,438 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 00:41:38,464 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 00:41:38,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:41:38,466 INFO L168 Benchmark]: Toolchain (without parser) took 12408.69 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.3 MB in the beginning and 44.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:38,467 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 38.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:38,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.26 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 40.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:38,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.84 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 40.5 MB in the beginning and 54.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:38,468 INFO L168 Benchmark]: Boogie Preprocessor took 20.60 ms. Allocated memory is still 71.3 MB. Free memory was 54.5 MB in the beginning and 53.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:38,468 INFO L168 Benchmark]: RCFGBuilder took 1335.84 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 41.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:38,469 INFO L168 Benchmark]: TraceAbstraction took 10767.05 ms. Allocated memory is still 71.3 MB. Free memory was 41.2 MB in the beginning and 47.3 MB in the end (delta: -6.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:38,469 INFO L168 Benchmark]: Witness Printer took 38.98 ms. Allocated memory is still 71.3 MB. Free memory was 47.3 MB in the beginning and 44.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:38,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 38.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.26 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 40.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.84 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 40.5 MB in the beginning and 54.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.60 ms. Allocated memory is still 71.3 MB. Free memory was 54.5 MB in the beginning and 53.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1335.84 ms. Allocated memory is still 71.3 MB. Free memory was 53.4 MB in the beginning and 41.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10767.05 ms. Allocated memory is still 71.3 MB. Free memory was 41.2 MB in the beginning and 47.3 MB in the end (delta: -6.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 38.98 ms. Allocated memory is still 71.3 MB. Free memory was 47.3 MB in the beginning and 44.9 MB in the end (delta: 2.4 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10715.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 16.3ms, AutomataDifference: 244.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 29.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 174.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2857.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 22.1ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 37.8ms SsaConstructionTime, 120.6ms SatisfiabilityAnalysisTime, 9688.2ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 31 SizeOfPredicates, 5 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 00:41:38,527 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...