./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/floats-cdfpl/square_4.i -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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:20:56,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:20:56,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:20:56,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:20:56,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:20:56,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:20:56,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:20:56,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:20:56,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:20:56,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:20:56,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:20:56,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:20:56,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:20:56,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:20:56,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:20:56,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:20:56,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:20:56,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:20:56,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:20:56,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:20:56,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:20:56,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:20:56,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:20:56,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:20:56,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:20:56,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:20:56,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:20:56,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:20:56,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:20:56,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:20:56,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:20:56,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:20:56,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:20:56,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:20:56,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:20:56,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:20:56,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:20:56,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:20:56,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:20:56,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:20:56,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:20:56,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:20:56,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:20:56,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:20:56,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:20:56,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:20:56,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:20:56,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:20:56,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:20:56,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:20:56,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:20:56,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:20:56,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:20:56,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:20:56,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:20:56,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:20:56,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:20:56,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:20:56,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:20:56,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:20:56,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:20:56,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2021-12-15 10:20:56,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:20:56,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:20:56,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:20:56,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:20:56,331 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:20:56,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-12-15 10:20:56,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82f7994/0ce5a290011a482882036fd05ed2d6e0/FLAG16b7ea8f6 [2021-12-15 10:20:56,763 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:20:56,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-12-15 10:20:56,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82f7994/0ce5a290011a482882036fd05ed2d6e0/FLAG16b7ea8f6 [2021-12-15 10:20:56,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82f7994/0ce5a290011a482882036fd05ed2d6e0 [2021-12-15 10:20:56,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:20:56,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:20:56,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:20:56,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:20:56,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:20:56,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:20:56" (1/1) ... [2021-12-15 10:20:56,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de0b6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:56, skipping insertion in model container [2021-12-15 10:20:56,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:20:56" (1/1) ... [2021-12-15 10:20:56,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:20:56,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:20:56,970 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/floats-cdfpl/square_4.i[1629,1642] [2021-12-15 10:20:56,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:20:56,982 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:20:56,995 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/floats-cdfpl/square_4.i[1629,1642] [2021-12-15 10:20:56,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:20:57,007 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:20:57,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57 WrapperNode [2021-12-15 10:20:57,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:20:57,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:20:57,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:20:57,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:20:57,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,030 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2021-12-15 10:20:57,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:20:57,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:20:57,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:20:57,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:20:57,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:20:57,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:20:57,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:20:57,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:20:57,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (1/1) ... [2021-12-15 10:20:57,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:20:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:20:57,075 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) [2021-12-15 10:20:57,095 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 [2021-12-15 10:20:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:20:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:20:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:20:57,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:20:57,155 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:20:57,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:20:57,240 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:20:57,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:20:57,245 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:20:57,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:20:57 BoogieIcfgContainer [2021-12-15 10:20:57,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:20:57,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:20:57,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:20:57,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:20:57,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:20:56" (1/3) ... [2021-12-15 10:20:57,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2645f028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:20:57, skipping insertion in model container [2021-12-15 10:20:57,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:20:57" (2/3) ... [2021-12-15 10:20:57,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2645f028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:20:57, skipping insertion in model container [2021-12-15 10:20:57,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:20:57" (3/3) ... [2021-12-15 10:20:57,253 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-12-15 10:20:57,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:20:57,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:20:57,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:20:57,309 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 [2021-12-15 10:20:57,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:20:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:20:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:20:57,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:20:57,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:20:57,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:20:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:20:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-12-15 10:20:57,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:20:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088020993] [2021-12-15 10:20:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:20:57,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:20:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:20:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:20:57,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:20:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088020993] [2021-12-15 10:20:57,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088020993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:20:57,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:20:57,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:20:57,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030436741] [2021-12-15 10:20:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:20:57,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:20:57,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:20:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:20:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:20:57,466 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:20:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:20:57,477 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-15 10:20:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:20:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 10:20:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:20:57,485 INFO L225 Difference]: With dead ends: 19 [2021-12-15 10:20:57,485 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 10:20:57,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:20:57,490 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:20:57,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:20:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 10:20:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 10:20:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:20:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-12-15 10:20:57,510 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-12-15 10:20:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:20:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-12-15 10:20:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:20:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-12-15 10:20:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:20:57,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:20:57,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:20:57,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:20:57,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:20:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:20:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-12-15 10:20:57,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:20:57,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398557885] [2021-12-15 10:20:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:20:57,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:20:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:20:57,543 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 10:20:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:20:57,573 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 10:20:57,574 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 10:20:57,576 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 10:20:57,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:20:57,582 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-15 10:20:57,585 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 10:20:57,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:20:57 BoogieIcfgContainer [2021-12-15 10:20:57,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 10:20:57,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 10:20:57,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 10:20:57,608 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 10:20:57,609 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:20:57" (3/4) ... [2021-12-15 10:20:57,611 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 10:20:57,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 10:20:57,613 INFO L158 Benchmark]: Toolchain (without parser) took 827.76ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.8MB in the beginning and 57.7MB in the end (delta: -3.8MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2021-12-15 10:20:57,613 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 86.0MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:20:57,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.35ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.6MB in the beginning and 91.2MB in the end (delta: -37.6MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-12-15 10:20:57,616 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.33ms. Allocated memory is still 115.3MB. Free memory was 91.2MB in the beginning and 89.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:20:57,619 INFO L158 Benchmark]: Boogie Preprocessor took 18.32ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 89.0MB in the end (delta: 717.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:20:57,619 INFO L158 Benchmark]: RCFGBuilder took 195.49ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 79.9MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:20:57,619 INFO L158 Benchmark]: TraceAbstraction took 359.53ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 57.7MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-15 10:20:57,620 INFO L158 Benchmark]: Witness Printer took 4.11ms. Allocated memory is still 115.3MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:20:57,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 86.0MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.35ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.6MB in the beginning and 91.2MB in the end (delta: -37.6MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.33ms. Allocated memory is still 115.3MB. Free memory was 91.2MB in the beginning and 89.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.32ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 89.0MB in the end (delta: 717.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 195.49ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 79.9MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 359.53ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 57.7MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 4.11ms. Allocated memory is still 115.3MB. Free memory is still 57.7MB. 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: 38]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L29] float IN = __VERIFIER_nondet_float(); [L30] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L24] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L30] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L32] float x = IN; [L34-L35] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L37] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=49, x=49] [L38] reach_error() VAL [IN=49, x=49] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 10 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-15 10:20:57,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_4.i -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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:20:59,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:20:59,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:20:59,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:20:59,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:20:59,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:20:59,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:20:59,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:20:59,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:20:59,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:20:59,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:20:59,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:20:59,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:20:59,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:20:59,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:20:59,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:20:59,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:20:59,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:20:59,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:20:59,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:20:59,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:20:59,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:20:59,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:20:59,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:20:59,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:20:59,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:20:59,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:20:59,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:20:59,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:20:59,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:20:59,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:20:59,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:20:59,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:20:59,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:20:59,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:20:59,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:20:59,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:20:59,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:20:59,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:20:59,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:20:59,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:20:59,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 10:20:59,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:20:59,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:20:59,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:20:59,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:20:59,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:20:59,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:20:59,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:20:59,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:20:59,322 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:20:59,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:20:59,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:20:59,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:20:59,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:20:59,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:20:59,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:20:59,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:20:59,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:20:59,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:20:59,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:20:59,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:20:59,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:20:59,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:20:59,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:20:59,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:20:59,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:20:59,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 10:20:59,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2021-12-15 10:20:59,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:20:59,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:20:59,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:20:59,609 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:20:59,609 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:20:59,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-12-15 10:20:59,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604ba2225/21104f2902294197b32c49ba60308111/FLAG0ececb3f6 [2021-12-15 10:21:00,007 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:21:00,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-12-15 10:21:00,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604ba2225/21104f2902294197b32c49ba60308111/FLAG0ececb3f6 [2021-12-15 10:21:00,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604ba2225/21104f2902294197b32c49ba60308111 [2021-12-15 10:21:00,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:21:00,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:21:00,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:00,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:21:00,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:21:00,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532540ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00, skipping insertion in model container [2021-12-15 10:21:00,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:21:00,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:21:00,545 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/floats-cdfpl/square_4.i[1629,1642] [2021-12-15 10:21:00,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:00,555 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:21:00,600 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/floats-cdfpl/square_4.i[1629,1642] [2021-12-15 10:21:00,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:00,619 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:21:00,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00 WrapperNode [2021-12-15 10:21:00,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:00,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:00,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:21:00,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:21:00,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,645 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2021-12-15 10:21:00,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:00,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:21:00,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:21:00,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:21:00,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:21:00,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:21:00,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:21:00,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:21:00,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (1/1) ... [2021-12-15 10:21:00,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:21:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:21:00,704 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) [2021-12-15 10:21:00,721 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 [2021-12-15 10:21:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:21:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 10:21:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:21:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:21:00,779 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:21:00,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:21:02,959 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:21:02,963 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:21:02,964 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:21:02,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:02 BoogieIcfgContainer [2021-12-15 10:21:02,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:21:02,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:21:02,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:21:02,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:21:02,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:21:00" (1/3) ... [2021-12-15 10:21:02,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5265e1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:02, skipping insertion in model container [2021-12-15 10:21:02,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:00" (2/3) ... [2021-12-15 10:21:02,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5265e1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:02, skipping insertion in model container [2021-12-15 10:21:02,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:02" (3/3) ... [2021-12-15 10:21:02,970 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-12-15 10:21:02,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:21:02,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:21:03,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:21:03,013 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 [2021-12-15 10:21:03,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:21:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:03,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:03,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:03,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-12-15 10:21:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:21:03,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959513203] [2021-12-15 10:21:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:03,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:21:03,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:21:03,049 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) [2021-12-15 10:21:03,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 10:21:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:21:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 10:21:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:21:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:21:03,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:21:03,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:21:03,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959513203] [2021-12-15 10:21:03,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959513203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:21:03,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:21:03,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:21:03,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769012610] [2021-12-15 10:21:03,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:21:03,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:21:03,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:21:03,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:21:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:21:03,529 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:21:03,537 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-15 10:21:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:21:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 10:21:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:21:03,542 INFO L225 Difference]: With dead ends: 19 [2021-12-15 10:21:03,543 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 10:21:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:21:03,547 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:21:03,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:21:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 10:21:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 10:21:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-12-15 10:21:03,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-12-15 10:21:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:21:03,566 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-12-15 10:21:03,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-12-15 10:21:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:03,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:03,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:03,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:21:03,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:21:03,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-12-15 10:21:03,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:21:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425478977] [2021-12-15 10:21:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:03,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:21:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:21:03,789 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) [2021-12-15 10:21:03,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process