./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1e69edbdce27e5f928ff7e136ee6812498ce7c35f38e45c8aa6d453823549eb --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 13:42:28,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:42:28,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:42:28,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:42:28,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:42:28,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:42:28,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:42:28,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:42:28,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:42:28,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:42:28,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:42:28,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:42:28,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:42:28,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:42:28,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:42:28,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:42:28,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:42:28,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:42:28,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:42:28,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:42:28,680 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:42:28,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:42:28,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:42:28,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:42:28,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:42:28,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:42:28,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:42:28,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:42:28,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:42:28,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:42:28,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:42:28,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:42:28,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:42:28,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:42:28,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:42:28,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:42:28,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:42:28,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:42:28,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:42:28,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:42:28,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:42:28,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:42:28,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 13:42:28,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:42:28,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:42:28,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:42:28,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:42:28,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:42:28,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:42:28,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:42:28,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:42:28,739 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:42:28,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:42:28,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:42:28,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 13:42:28,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:42:28,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:42:28,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:42:28,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:42:28,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:42:28,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:42:28,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:42:28,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:42:28,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:42:28,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:42:28,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:42:28,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:42:28,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:42:28,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:42:28,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:42:28,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:42:28,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 13:42:28,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 13:42:28,743 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:42:28,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:42:28,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:42:28,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1e69edbdce27e5f928ff7e136ee6812498ce7c35f38e45c8aa6d453823549eb [2022-07-19 13:42:28,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:42:28,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:42:28,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:42:28,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:42:28,976 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:42:28,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2022-07-19 13:42:29,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988c7a692/a19c343781b849a4ada9ec0ba8739b58/FLAG14463f2d5 [2022-07-19 13:42:29,406 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:42:29,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2022-07-19 13:42:29,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988c7a692/a19c343781b849a4ada9ec0ba8739b58/FLAG14463f2d5 [2022-07-19 13:42:29,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988c7a692/a19c343781b849a4ada9ec0ba8739b58 [2022-07-19 13:42:29,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:42:29,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:42:29,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:42:29,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:42:29,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:42:29,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468c5e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29, skipping insertion in model container [2022-07-19 13:42:29,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:42:29,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:42:29,591 WARN L230 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-2.c[484,497] [2022-07-19 13:42:29,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:42:29,619 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:42:29,632 WARN L230 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-2.c[484,497] [2022-07-19 13:42:29,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:42:29,647 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:42:29,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29 WrapperNode [2022-07-19 13:42:29,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:42:29,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:42:29,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:42:29,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:42:29,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,679 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 31 [2022-07-19 13:42:29,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:42:29,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:42:29,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:42:29,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:42:29,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:42:29,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:42:29,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:42:29,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:42:29,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (1/1) ... [2022-07-19 13:42:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:42:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:42:29,745 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) [2022-07-19 13:42:29,766 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 [2022-07-19 13:42:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:42:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 13:42:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:42:29,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:42:29,835 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:42:29,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:42:29,938 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:42:29,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:42:29,944 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 13:42:29,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:29 BoogieIcfgContainer [2022-07-19 13:42:29,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:42:29,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:42:29,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:42:29,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:42:29,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:42:29" (1/3) ... [2022-07-19 13:42:29,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449f98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:42:29, skipping insertion in model container [2022-07-19 13:42:29,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:29" (2/3) ... [2022-07-19 13:42:29,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449f98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:42:29, skipping insertion in model container [2022-07-19 13:42:29,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:29" (3/3) ... [2022-07-19 13:42:29,966 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2022-07-19 13:42:29,978 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:42:29,979 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:42:30,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:42:30,068 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25a714b7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d4db7ec [2022-07-19 13:42:30,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:42:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-19 13:42:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 13:42:30,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:42:30,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:42:30,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:42:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:42:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1804966375, now seen corresponding path program 1 times [2022-07-19 13:42:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:42:30,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616059839] [2022-07-19 13:42:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:42:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:42:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:42:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:42:30,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:42:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616059839] [2022-07-19 13:42:30,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616059839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:42:30,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:42:30,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:42:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460140052] [2022-07-19 13:42:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:42:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:42:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:42:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:42:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:42:30,225 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 13:42:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:42:30,259 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-19 13:42:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:42:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-19 13:42:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:42:30,267 INFO L225 Difference]: With dead ends: 23 [2022-07-19 13:42:30,267 INFO L226 Difference]: Without dead ends: 8 [2022-07-19 13:42:30,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:42:30,291 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:42:30,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:42:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-19 13:42:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-19 13:42:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 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) [2022-07-19 13:42:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2022-07-19 13:42:30,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2022-07-19 13:42:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:42:30,324 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2022-07-19 13:42:30,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 13:42:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2022-07-19 13:42:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 13:42:30,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:42:30,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:42:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 13:42:30,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:42:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:42:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1806813417, now seen corresponding path program 1 times [2022-07-19 13:42:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:42:30,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181268620] [2022-07-19 13:42:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:42:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:42:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:42:30,347 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 13:42:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:42:30,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 13:42:30,383 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 13:42:30,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 13:42:30,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 13:42:30,390 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 13:42:30,394 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 13:42:30,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 01:42:30 BoogieIcfgContainer [2022-07-19 13:42:30,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 13:42:30,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 13:42:30,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 13:42:30,414 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 13:42:30,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:29" (3/4) ... [2022-07-19 13:42:30,418 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 13:42:30,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 13:42:30,419 INFO L158 Benchmark]: Toolchain (without parser) took 993.23ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 66.0MB in the beginning and 86.6MB in the end (delta: -20.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:30,419 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory is still 52.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:30,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.54ms. Allocated memory is still 96.5MB. Free memory was 65.7MB in the beginning and 73.1MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 13:42:30,420 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.03ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 71.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:42:30,421 INFO L158 Benchmark]: Boogie Preprocessor took 23.42ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.7MB in the end (delta: 990.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:30,423 INFO L158 Benchmark]: RCFGBuilder took 239.96ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 61.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 13:42:30,424 INFO L158 Benchmark]: TraceAbstraction took 453.17ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.5MB in the beginning and 87.1MB in the end (delta: -25.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:30,424 INFO L158 Benchmark]: Witness Printer took 5.25ms. Allocated memory is still 117.4MB. Free memory was 87.1MB in the beginning and 86.6MB in the end (delta: 531.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:42:30,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory is still 52.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.54ms. Allocated memory is still 96.5MB. Free memory was 65.7MB in the beginning and 73.1MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.03ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 71.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.42ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.7MB in the end (delta: 990.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 239.96ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 61.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 453.17ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.5MB in the beginning and 87.1MB in the end (delta: -25.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.25ms. Allocated memory is still 117.4MB. Free memory was 87.1MB in the beginning and 86.6MB in the end (delta: 531.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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() [L20] CALL assume_abort_if_not(x >= -1.f && x <= 1.f) [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L20] RET assume_abort_if_not(x >= -1.f && x <= 1.f) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L24] CALL __VERIFIER_assert(y != 0.f) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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 [2022-07-19 13:42:30,465 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1e69edbdce27e5f928ff7e136ee6812498ce7c35f38e45c8aa6d453823549eb --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 13:42:32,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:42:32,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:42:32,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:42:32,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:42:32,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:42:32,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:42:32,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:42:32,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:42:32,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:42:32,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:42:32,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:42:32,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:42:32,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:42:32,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:42:32,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:42:32,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:42:32,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:42:32,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:42:32,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:42:32,505 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:42:32,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:42:32,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:42:32,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:42:32,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:42:32,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:42:32,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:42:32,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:42:32,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:42:32,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:42:32,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:42:32,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:42:32,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:42:32,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:42:32,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:42:32,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:42:32,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:42:32,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:42:32,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:42:32,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:42:32,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:42:32,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:42:32,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 13:42:32,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:42:32,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:42:32,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:42:32,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:42:32,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:42:32,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:42:32,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:42:32,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:42:32,569 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:42:32,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:42:32,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:42:32,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:42:32,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:42:32,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:42:32,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:42:32,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:42:32,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 13:42:32,572 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 13:42:32,572 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 13:42:32,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:42:32,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:42:32,573 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:42:32,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:42:32,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:42:32,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:42:32,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:42:32,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:42:32,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:42:32,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:42:32,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:42:32,575 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 13:42:32,575 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 13:42:32,575 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:42:32,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:42:32,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:42:32,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 13:42:32,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1e69edbdce27e5f928ff7e136ee6812498ce7c35f38e45c8aa6d453823549eb [2022-07-19 13:42:32,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:42:32,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:42:32,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:42:32,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:42:32,935 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:42:32,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2022-07-19 13:42:32,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc6debee/5e0c16a0ad294b408189289bc5508bfd/FLAG97ded9383 [2022-07-19 13:42:33,403 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:42:33,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2022-07-19 13:42:33,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc6debee/5e0c16a0ad294b408189289bc5508bfd/FLAG97ded9383 [2022-07-19 13:42:33,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc6debee/5e0c16a0ad294b408189289bc5508bfd [2022-07-19 13:42:33,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:42:33,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:42:33,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:42:33,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:42:33,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:42:33,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:42:33" (1/1) ... [2022-07-19 13:42:33,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e87c5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:33, skipping insertion in model container [2022-07-19 13:42:33,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:42:33" (1/1) ... [2022-07-19 13:42:33,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:42:33,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:42:33,999 WARN L230 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-2.c[484,497] [2022-07-19 13:42:34,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:42:34,032 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:42:34,046 WARN L230 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-2.c[484,497] [2022-07-19 13:42:34,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:42:34,078 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:42:34,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34 WrapperNode [2022-07-19 13:42:34,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:42:34,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:42:34,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:42:34,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:42:34,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,126 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 32 [2022-07-19 13:42:34,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:42:34,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:42:34,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:42:34,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:42:34,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:42:34,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:42:34,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:42:34,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:42:34,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (1/1) ... [2022-07-19 13:42:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:42:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:42:34,205 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) [2022-07-19 13:42:34,231 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 [2022-07-19 13:42:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:42:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 13:42:34,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:42:34,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:42:34,314 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:42:34,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:42:35,003 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:42:35,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:42:35,008 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 13:42:35,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:35 BoogieIcfgContainer [2022-07-19 13:42:35,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:42:35,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:42:35,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:42:35,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:42:35,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:42:33" (1/3) ... [2022-07-19 13:42:35,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee3faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:42:35, skipping insertion in model container [2022-07-19 13:42:35,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:42:34" (2/3) ... [2022-07-19 13:42:35,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee3faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:42:35, skipping insertion in model container [2022-07-19 13:42:35,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:35" (3/3) ... [2022-07-19 13:42:35,016 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2022-07-19 13:42:35,028 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:42:35,028 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:42:35,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:42:35,074 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30f6a676, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5a9665ee [2022-07-19 13:42:35,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:42:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-19 13:42:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 13:42:35,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:42:35,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:42:35,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:42:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:42:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1804966375, now seen corresponding path program 1 times [2022-07-19 13:42:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:42:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969177447] [2022-07-19 13:42:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:42:35,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:42:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:42:35,135 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) [2022-07-19 13:42:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 13:42:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:42:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 13:42:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:42:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:42:35,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:42:35,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:42:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969177447] [2022-07-19 13:42:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969177447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:42:35,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:42:35,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:42:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341249582] [2022-07-19 13:42:35,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:42:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:42:35,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:42:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:42:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:42:35,289 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 13:42:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:42:35,300 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-19 13:42:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:42:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-19 13:42:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:42:35,309 INFO L225 Difference]: With dead ends: 23 [2022-07-19 13:42:35,309 INFO L226 Difference]: Without dead ends: 8 [2022-07-19 13:42:35,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:42:35,315 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 13:42:35,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 13:42:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-19 13:42:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-19 13:42:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 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) [2022-07-19 13:42:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2022-07-19 13:42:35,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2022-07-19 13:42:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:42:35,340 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2022-07-19 13:42:35,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 13:42:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2022-07-19 13:42:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 13:42:35,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:42:35,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:42:35,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 13:42:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:42:35,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:42:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:42:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1806813417, now seen corresponding path program 1 times [2022-07-19 13:42:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:42:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544632865] [2022-07-19 13:42:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:42:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:42:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:42:35,558 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) [2022-07-19 13:42:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 13:42:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:42:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 13:42:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:42:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:42:37,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:42:37,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:42:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544632865] [2022-07-19 13:42:37,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544632865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:42:37,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:42:37,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 13:42:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101764057] [2022-07-19 13:42:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:42:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 13:42:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:42:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 13:42:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 13:42:37,096 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-19 13:42:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:42:37,297 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2022-07-19 13:42:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 13:42:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2022-07-19 13:42:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:42:37,298 INFO L225 Difference]: With dead ends: 8 [2022-07-19 13:42:37,298 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 13:42:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-19 13:42:37,300 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 13:42:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 13:42:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 13:42:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 13:42:37,301 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) [2022-07-19 13:42:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 13:42:37,302 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2022-07-19 13:42:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:42:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 13:42:37,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-19 13:42:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 13:42:37,302 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 13:42:37,305 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 13:42:37,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-19 13:42:37,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:42:37,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 13:42:37,514 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 13:42:37,514 INFO L902 garLoopResultBuilder]: At program point L27(lines 15 28) the Hoare annotation is: true [2022-07-19 13:42:37,514 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-07-19 13:42:37,514 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-07-19 13:42:37,515 INFO L899 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-07-19 13:42:37,515 INFO L902 garLoopResultBuilder]: At program point L13-3(line 13) the Hoare annotation is: true [2022-07-19 13:42:37,515 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 13:42:37,515 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 13:42:37,515 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 13:42:37,516 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-07-19 13:42:37,516 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-07-19 13:42:37,516 INFO L899 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2022-07-19 13:42:37,516 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2022-07-19 13:42:37,519 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 13:42:37,521 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 13:42:37,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 01:42:37 BoogieIcfgContainer [2022-07-19 13:42:37,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 13:42:37,529 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 13:42:37,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 13:42:37,530 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 13:42:37,530 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:42:35" (3/4) ... [2022-07-19 13:42:37,533 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 13:42:37,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-07-19 13:42:37,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-19 13:42:37,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 13:42:37,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 13:42:37,574 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 13:42:37,574 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 13:42:37,575 INFO L158 Benchmark]: Toolchain (without parser) took 3745.57ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 39.7MB in the beginning and 45.7MB in the end (delta: -6.0MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,575 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 60.8MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:37,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.31ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 44.8MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,576 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.87ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,581 INFO L158 Benchmark]: Boogie Preprocessor took 44.86ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 42.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:42:37,582 INFO L158 Benchmark]: RCFGBuilder took 835.83ms. Allocated memory is still 60.8MB. Free memory was 42.1MB in the beginning and 34.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,582 INFO L158 Benchmark]: TraceAbstraction took 2516.55ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 33.4MB in the beginning and 48.3MB in the end (delta: -14.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,582 INFO L158 Benchmark]: Witness Printer took 45.14ms. Allocated memory is still 77.6MB. Free memory was 48.3MB in the beginning and 45.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:42:37,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 60.8MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.31ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 44.8MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.87ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.86ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 42.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 835.83ms. Allocated memory is still 60.8MB. Free memory was 42.1MB in the beginning and 34.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2516.55ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 33.4MB in the beginning and 48.3MB in the end (delta: -14.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. * Witness Printer took 45.14ms. Allocated memory is still 77.6MB. Free memory was 48.3MB in the beginning and 45.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 15 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 6 NumberOfNonLiveVariables, 50 ConjunctsInSsa, 10 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 13:42:37,645 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE