./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/interpolation2.c.v+cfa-reducer.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 a4b21fc033f5ea5cebc3419535848f3ce92b08a7177da8a580c018ae56dea99e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:49:31,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:49:31,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:49:31,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:49:31,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:49:31,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:49:31,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:49:31,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:49:31,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:49:31,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:49:31,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:49:31,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:49:31,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:49:31,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:49:31,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:49:31,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:49:31,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:49:31,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:49:31,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:49:31,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:49:31,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:49:31,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:49:31,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:49:31,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:49:31,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:49:31,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:49:31,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:49:31,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:49:31,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:49:31,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:49:31,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:49:31,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:49:31,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:49:31,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:49:31,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:49:31,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:49:31,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:49:31,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:49:31,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:49:31,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:49:31,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:49:31,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:49:31,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:49:31,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:49:31,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:49:31,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:49:31,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:49:31,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:49:31,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:49:31,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:49:31,757 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:49:31,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:49:31,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:49:31,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:49:31,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:49:31,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:49:31,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:49:31,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:49:31,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:49:31,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:49:31,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:49:31,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:49:31,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:49:31,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:49:31,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4b21fc033f5ea5cebc3419535848f3ce92b08a7177da8a580c018ae56dea99e [2021-12-21 11:49:31,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:49:31,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:49:31,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:49:31,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:49:31,970 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:49:31,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:32,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c5885399/f5f67213eb2743fbbbb2115c5c42b21a/FLAGa365e14f7 [2021-12-21 11:49:32,381 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:49:32,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:32,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c5885399/f5f67213eb2743fbbbb2115c5c42b21a/FLAGa365e14f7 [2021-12-21 11:49:32,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c5885399/f5f67213eb2743fbbbb2115c5c42b21a [2021-12-21 11:49:32,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:49:32,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:49:32,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:49:32,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:49:32,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:49:32,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d550c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32, skipping insertion in model container [2021-12-21 11:49:32,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:49:32,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:49:32,528 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/interpolation2.c.v+cfa-reducer.c[1463,1476] [2021-12-21 11:49:32,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:49:32,535 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:49:32,549 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/interpolation2.c.v+cfa-reducer.c[1463,1476] [2021-12-21 11:49:32,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:49:32,560 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:49:32,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32 WrapperNode [2021-12-21 11:49:32,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:49:32,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:49:32,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:49:32,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:49:32,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,595 INFO L137 Inliner]: procedures = 18, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2021-12-21 11:49:32,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:49:32,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:49:32,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:49:32,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:49:32,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:49:32,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:49:32,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:49:32,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:49:32,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (1/1) ... [2021-12-21 11:49:32,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:49:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:49:32,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:49:32,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:49:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:49:32,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-12-21 11:49:32,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 11:49:32,730 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:49:32,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:49:32,834 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:49:32,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:49:32,839 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:49:32,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:49:32 BoogieIcfgContainer [2021-12-21 11:49:32,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:49:32,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:49:32,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:49:32,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:49:32,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:49:32" (1/3) ... [2021-12-21 11:49:32,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb457e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:49:32, skipping insertion in model container [2021-12-21 11:49:32,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:32" (2/3) ... [2021-12-21 11:49:32,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb457e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:49:32, skipping insertion in model container [2021-12-21 11:49:32,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:49:32" (3/3) ... [2021-12-21 11:49:32,847 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:32,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:49:32,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:49:32,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:49:32,923 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:49:32,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:49:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:49:32,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:32,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:32,949 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1718991182, now seen corresponding path program 1 times [2021-12-21 11:49:32,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:49:32,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888310369] [2021-12-21 11:49:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:32,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:49:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:49:33,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:49:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888310369] [2021-12-21 11:49:33,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888310369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:49:33,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:49:33,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:49:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869580939] [2021-12-21 11:49:33,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:49:33,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:49:33,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:49:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:49:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:49:33,234 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:49:33,287 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-21 11:49:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 11:49:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:49:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:49:33,297 INFO L225 Difference]: With dead ends: 31 [2021-12-21 11:49:33,297 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 11:49:33,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:49:33,304 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:49:33,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:49:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 11:49:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-21 11:49:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-21 11:49:33,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-12-21 11:49:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:49:33,326 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-21 11:49:33,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-21 11:49:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:49:33,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:33,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:49:33,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1736001843, now seen corresponding path program 1 times [2021-12-21 11:49:33,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:49:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36892680] [2021-12-21 11:49:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:33,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:49:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:49:33,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:49:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36892680] [2021-12-21 11:49:33,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36892680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:49:33,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:49:33,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:49:33,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237546146] [2021-12-21 11:49:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:49:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:49:33,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:49:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:49:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:49:33,379 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:49:33,393 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-21 11:49:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:49:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:49:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:49:33,394 INFO L225 Difference]: With dead ends: 33 [2021-12-21 11:49:33,394 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 11:49:33,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:49:33,399 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:49:33,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:49:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 11:49:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-12-21 11:49:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-21 11:49:33,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-12-21 11:49:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:49:33,408 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-21 11:49:33,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-21 11:49:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:49:33,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:33,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:33,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:49:33,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -842300589, now seen corresponding path program 1 times [2021-12-21 11:49:33,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:49:33,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778234117] [2021-12-21 11:49:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:33,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:49:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:49:33,435 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:49:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:49:33,466 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:49:33,468 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:49:33,469 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 11:49:33,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:49:33,476 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-21 11:49:33,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:49:33,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:49:33 BoogieIcfgContainer [2021-12-21 11:49:33,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:49:33,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:49:33,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:49:33,509 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:49:33,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:49:32" (3/4) ... [2021-12-21 11:49:33,511 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:49:33,511 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:49:33,511 INFO L158 Benchmark]: Toolchain (without parser) took 1116.25ms. Allocated memory is still 98.6MB. Free memory was 74.5MB in the beginning and 54.1MB in the end (delta: 20.4MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2021-12-21 11:49:33,511 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 79.7MB. Free memory is still 41.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:49:33,511 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.03ms. Allocated memory is still 98.6MB. Free memory was 74.3MB in the beginning and 74.5MB in the end (delta: -133.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:49:33,512 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.15ms. Allocated memory is still 98.6MB. Free memory was 74.5MB in the beginning and 72.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:49:33,512 INFO L158 Benchmark]: Boogie Preprocessor took 15.58ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:49:33,512 INFO L158 Benchmark]: RCFGBuilder took 228.63ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 59.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 11:49:33,512 INFO L158 Benchmark]: TraceAbstraction took 665.63ms. Allocated memory is still 98.6MB. Free memory was 58.7MB in the beginning and 54.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2021-12-21 11:49:33,513 INFO L158 Benchmark]: Witness Printer took 2.19ms. Allocated memory is still 98.6MB. Free memory was 54.5MB in the beginning and 54.1MB in the end (delta: 398.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:49:33,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 79.7MB. Free memory is still 41.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.03ms. Allocated memory is still 98.6MB. Free memory was 74.3MB in the beginning and 74.5MB in the end (delta: -133.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.15ms. Allocated memory is still 98.6MB. Free memory was 74.5MB in the beginning and 72.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.58ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 228.63ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 59.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 665.63ms. Allocated memory is still 98.6MB. Free memory was 58.7MB in the beginning and 54.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Witness Printer took 2.19ms. Allocated memory is still 98.6MB. Free memory was 54.5MB in the beginning and 54.1MB in the end (delta: 398.0kB). There was no memory consumed. 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: 53]: 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 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 40, overapproximation of to_real at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L1] int __return_main; [L12] int __return_129; VAL [__return_129=0, __return_main=0] [L15] int main__i; [L16] float main__z; [L17] float main__t; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L20] float main__org[5] = { 1, 5, -10, 30, 20 }; [L21] float main__slope[5] = { 4, -15, 40, -10, 0 }; [L22] main__t = __VERIFIER_nondet_float() [L23] int main____CPAchecker_TMP_0; [L24] EXPR main__min[0] VAL [__return_129=0, __return_main=0, main__max={6:0}, main__min={7:0}, main__min[0]=49, main__org={4:0}, main__slope={5:0}] [L24] COND TRUE main__t >= (main__min[0]) [L26] EXPR main__max[4UL] VAL [__return_129=0, __return_main=0, main__max={6:0}, main__max[4UL]=51, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L26] COND TRUE main__t <= (main__max[4UL]) [L28] main____CPAchecker_TMP_0 = 1 VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L29] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] main__i = 0 VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L33] COND TRUE main__i < 5UL [L35] EXPR main__max[main__i] VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__max[main__i]=50, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L35] COND TRUE main__t <= (main__max[main__i]) [L38] EXPR main__org[main__i] [L38] EXPR main__slope[main__i] [L38] EXPR main__min[main__i] [L38] EXPR main__max[main__i] [L38] EXPR main__min[main__i] [L38] main__z = (main__org[main__i]) + (((main__slope[main__i]) * (main__t - (main__min[main__i]))) / ((main__max[main__i]) - (main__min[main__i]))) [L39] int main____CPAchecker_TMP_1; VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L40] COND FALSE !(main__z >= -10.0) VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L66] main____CPAchecker_TMP_1 = 0 VAL [__return_129=0, __return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L47] int __tmp_1; [L48] __tmp_1 = main____CPAchecker_TMP_1 [L49] int __VERIFIER_assert__cond; [L50] __VERIFIER_assert__cond = __tmp_1 VAL [__return_129=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L51] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_129=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L53] reach_error() VAL [__return_129=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 92 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19 IncrementalHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 37 mSDtfsCounter, 19 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 9, 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, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-21 11:49:33,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- 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/interpolation2.c.v+cfa-reducer.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 a4b21fc033f5ea5cebc3419535848f3ce92b08a7177da8a580c018ae56dea99e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:49:35,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:49:35,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:49:35,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:49:35,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:49:35,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:49:35,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:49:35,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:49:35,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:49:35,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:49:35,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:49:35,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:49:35,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:49:35,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:49:35,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:49:35,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:49:35,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:49:35,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:49:35,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:49:35,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:49:35,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:49:35,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:49:35,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:49:35,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:49:35,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:49:35,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:49:35,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:49:35,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:49:35,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:49:35,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:49:35,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:49:35,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:49:35,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:49:35,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:49:35,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:49:35,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:49:35,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:49:35,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:49:35,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:49:35,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:49:35,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:49:35,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:49:35,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:49:35,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:49:35,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:49:35,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:49:35,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:49:35,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:49:35,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:49:35,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:49:35,208 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:49:35,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:49:35,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:49:35,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:49:35,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:49:35,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:49:35,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:49:35,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:49:35,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:49:35,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:49:35,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:49:35,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:49:35,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:49:35,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:49:35,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:49:35,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:49:35,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:49:35,220 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:49:35,220 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:49:35,220 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:49:35,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:49:35,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:49:35,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:49:35,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:49:35,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4b21fc033f5ea5cebc3419535848f3ce92b08a7177da8a580c018ae56dea99e [2021-12-21 11:49:35,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:49:35,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:49:35,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:49:35,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:49:35,502 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:49:35,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:35,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06b5dbf4/79a6c232afb943039e72faa18c9b2335/FLAG8cf5c9c9d [2021-12-21 11:49:35,876 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:49:35,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:35,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06b5dbf4/79a6c232afb943039e72faa18c9b2335/FLAG8cf5c9c9d [2021-12-21 11:49:36,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06b5dbf4/79a6c232afb943039e72faa18c9b2335 [2021-12-21 11:49:36,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:49:36,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:49:36,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:49:36,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:49:36,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:49:36,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79128e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36, skipping insertion in model container [2021-12-21 11:49:36,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:49:36,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:49:36,405 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/interpolation2.c.v+cfa-reducer.c[1463,1476] [2021-12-21 11:49:36,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:49:36,414 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:49:36,430 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/interpolation2.c.v+cfa-reducer.c[1463,1476] [2021-12-21 11:49:36,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:49:36,441 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:49:36,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36 WrapperNode [2021-12-21 11:49:36,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:49:36,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:49:36,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:49:36,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:49:36,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,497 INFO L137 Inliner]: procedures = 19, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2021-12-21 11:49:36,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:49:36,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:49:36,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:49:36,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:49:36,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:49:36,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:49:36,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:49:36,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:49:36,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (1/1) ... [2021-12-21 11:49:36,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:49:36,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:49:36,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:49:36,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:49:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:49:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2021-12-21 11:49:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:49:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 11:49:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-12-21 11:49:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:49:36,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:49:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 11:49:36,614 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:49:36,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:49:39,165 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:49:39,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:49:39,170 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:49:39,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:49:39 BoogieIcfgContainer [2021-12-21 11:49:39,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:49:39,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:49:39,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:49:39,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:49:39,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:49:36" (1/3) ... [2021-12-21 11:49:39,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ecd3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:49:39, skipping insertion in model container [2021-12-21 11:49:39,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:49:36" (2/3) ... [2021-12-21 11:49:39,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ecd3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:49:39, skipping insertion in model container [2021-12-21 11:49:39,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:49:39" (3/3) ... [2021-12-21 11:49:39,176 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.v+cfa-reducer.c [2021-12-21 11:49:39,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:49:39,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:49:39,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:49:39,238 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:49:39,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:49:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 11:49:39,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:39,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:39,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1718991182, now seen corresponding path program 1 times [2021-12-21 11:49:39,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:49:39,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813249640] [2021-12-21 11:49:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:39,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:49:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:49:39,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:49:39,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 11:49:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:49:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:49:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:49:39,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:49:39,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:49:39,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813249640] [2021-12-21 11:49:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813249640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:49:39,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:49:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:49:39,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575598078] [2021-12-21 11:49:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:49:39,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:49:39,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:49:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:49:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:49:39,730 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:42,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 11:49:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:49:42,099 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-12-21 11:49:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:49:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 11:49:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:49:42,107 INFO L225 Difference]: With dead ends: 32 [2021-12-21 11:49:42,107 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 11:49:42,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:49:42,111 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:49:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:49:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 11:49:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-21 11:49:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-21 11:49:42,134 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2021-12-21 11:49:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:49:42,134 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-21 11:49:42,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-21 11:49:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:49:42,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:42,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:42,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 11:49:42,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:49:42,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -859311250, now seen corresponding path program 1 times [2021-12-21 11:49:42,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:49:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543510854] [2021-12-21 11:49:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:42,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:49:42,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:49:42,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:49:42,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 11:49:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:49:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:49:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:49:42,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:49:42,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:49:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543510854] [2021-12-21 11:49:42,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543510854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:49:42,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:49:42,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:49:42,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112348949] [2021-12-21 11:49:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:49:42,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:49:42,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:49:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:49:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:49:42,773 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:44,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 11:49:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:49:45,116 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-12-21 11:49:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:49:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-12-21 11:49:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:49:45,117 INFO L225 Difference]: With dead ends: 20 [2021-12-21 11:49:45,117 INFO L226 Difference]: Without dead ends: 16 [2021-12-21 11:49:45,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:49:45,118 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:49:45,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:49:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-21 11:49:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-21 11:49:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-21 11:49:45,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-12-21 11:49:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:49:45,122 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-21 11:49:45,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:49:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-21 11:49:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:49:45,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:49:45,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:49:45,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:49:45,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:49:45,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:49:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:49:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -842300589, now seen corresponding path program 1 times [2021-12-21 11:49:45,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:49:45,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134330515] [2021-12-21 11:49:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:49:45,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:49:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:49:45,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:49:45,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 11:49:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 11:49:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:49:51,061 INFO L353 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-12-21 11:49:51,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 266 treesize of output 146 [2021-12-21 11:50:40,600 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_3 (_ BitVec 32))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32)) (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_5 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32)) (v_arrayElimCell_2 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_5) ((_ extract 30 23) v_arrayElimCell_5) ((_ extract 22 0) v_arrayElimCell_5))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_2) ((_ extract 30 23) v_arrayElimCell_2) ((_ extract 22 0) v_arrayElimCell_2))) (.cse3 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv1 32)) .cse0) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse1) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32)) .cse2) (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.add c_currentRoundingMode .cse0 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse1)) (fp.sub c_currentRoundingMode .cse2 .cse1)))) (= .cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv4 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse2)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false