./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/exp_loop.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/exp_loop.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 8d8110300cda7d6230101fbf6f86509d455885849ba4fd2c9ffa62e45e5fbc59 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:45:55,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:45:55,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:45:55,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:45:55,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:45:55,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:45:55,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:45:55,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:45:55,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:45:55,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:45:55,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:45:55,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:45:55,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:45:55,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:45:55,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:45:55,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:45:55,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:45:55,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:45:55,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:45:55,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:45:55,293 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:45:55,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:45:55,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:45:55,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:45:55,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:45:55,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:45:55,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:45:55,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:45:55,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:45:55,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:45:55,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:45:55,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:45:55,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:45:55,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:45:55,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:45:55,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:45:55,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:45:55,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:45:55,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:45:55,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:45:55,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:45:55,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:45:55,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 13:45:55,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:45:55,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:45:55,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:45:55,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:45:55,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:45:55,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:45:55,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:45:55,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:45:55,344 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:45:55,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:45:55,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:45:55,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 13:45:55,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:45:55,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:45:55,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:45:55,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:45:55,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:45:55,346 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:45:55,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:45:55,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:45:55,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:45:55,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:45:55,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:45:55,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:45:55,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:45:55,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:45:55,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:45:55,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:45:55,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 13:45:55,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 13:45:55,349 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:45:55,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:45:55,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:45:55,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8110300cda7d6230101fbf6f86509d455885849ba4fd2c9ffa62e45e5fbc59 [2022-07-22 13:45:55,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:45:55,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:45:55,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:45:55,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:45:55,565 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:45:55,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/exp_loop.c [2022-07-22 13:45:55,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0e41e7/595d0fbfd6d74995b8b7a4141d008d88/FLAGf98ace9bc [2022-07-22 13:45:55,996 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:45:55,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/exp_loop.c [2022-07-22 13:45:56,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0e41e7/595d0fbfd6d74995b8b7a4141d008d88/FLAGf98ace9bc [2022-07-22 13:45:56,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b0e41e7/595d0fbfd6d74995b8b7a4141d008d88 [2022-07-22 13:45:56,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:45:56,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:45:56,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:45:56,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:45:56,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:45:56,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfce234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56, skipping insertion in model container [2022-07-22 13:45:56,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:45:56,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:45:56,188 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/exp_loop.c[587,600] [2022-07-22 13:45:56,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:45:56,208 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:45:56,216 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/exp_loop.c[587,600] [2022-07-22 13:45:56,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:45:56,237 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:45:56,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56 WrapperNode [2022-07-22 13:45:56,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:45:56,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:45:56,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:45:56,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:45:56,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,261 INFO L137 Inliner]: procedures = 18, calls = 17, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-07-22 13:45:56,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:45:56,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:45:56,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:45:56,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:45:56,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:45:56,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:45:56,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:45:56,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:45:56,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (1/1) ... [2022-07-22 13:45:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:45:56,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:45:56,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 13:45:56,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 13:45:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:45:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 13:45:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 13:45:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 13:45:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:45:56,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:45:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 13:45:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 13:45:56,384 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:45:56,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:45:56,536 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:45:56,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:45:56,553 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 13:45:56,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:45:56 BoogieIcfgContainer [2022-07-22 13:45:56,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:45:56,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:45:56,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:45:56,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:45:56,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:45:56" (1/3) ... [2022-07-22 13:45:56,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d7f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:45:56, skipping insertion in model container [2022-07-22 13:45:56,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:56" (2/3) ... [2022-07-22 13:45:56,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d7f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:45:56, skipping insertion in model container [2022-07-22 13:45:56,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:45:56" (3/3) ... [2022-07-22 13:45:56,569 INFO L111 eAbstractionObserver]: Analyzing ICFG exp_loop.c [2022-07-22 13:45:56,578 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:45:56,578 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:45:56,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:45:56,650 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f7129af, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1436f470 [2022-07-22 13:45:56,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:45:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:45:56,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:45:56,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:45:56,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:45:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:45:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -250377569, now seen corresponding path program 1 times [2022-07-22 13:45:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:45:56,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912309344] [2022-07-22 13:45:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:45:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:45:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:45:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:45:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:45:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912309344] [2022-07-22 13:45:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912309344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:45:56,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:45:56,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:45:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397175074] [2022-07-22 13:45:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:45:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 13:45:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:45:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 13:45:56,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:45:56,826 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:45:56,840 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2022-07-22 13:45:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 13:45:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 16 [2022-07-22 13:45:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:45:56,846 INFO L225 Difference]: With dead ends: 45 [2022-07-22 13:45:56,847 INFO L226 Difference]: Without dead ends: 20 [2022-07-22 13:45:56,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:45:56,851 INFO L413 NwaCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:45:56,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:45:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-22 13:45:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-22 13:45:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-22 13:45:56,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 16 [2022-07-22 13:45:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:45:56,872 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 13:45:56,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-07-22 13:45:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:45:56,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:45:56,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:45:56,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 13:45:56,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:45:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:45:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1261494819, now seen corresponding path program 1 times [2022-07-22 13:45:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:45:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87074460] [2022-07-22 13:45:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:45:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:45:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:45:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:45:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:45:56,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87074460] [2022-07-22 13:45:56,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87074460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:45:56,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:45:56,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:45:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854977382] [2022-07-22 13:45:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:45:56,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:45:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:45:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:45:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:45:56,925 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:45:56,937 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-22 13:45:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:45:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2022-07-22 13:45:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:45:56,938 INFO L225 Difference]: With dead ends: 26 [2022-07-22 13:45:56,938 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 13:45:56,939 INFO L412 NwaCegarLoop]: 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 [2022-07-22 13:45:56,940 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:45:56,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:45:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 13:45:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 13:45:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-22 13:45:56,944 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2022-07-22 13:45:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:45:56,944 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-22 13:45:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:45:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-07-22 13:45:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:45:56,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:45:56,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:45:56,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 13:45:56,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:45:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:45:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1675232227, now seen corresponding path program 1 times [2022-07-22 13:45:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:45:56,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978233976] [2022-07-22 13:45:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:45:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:45:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 13:45:56,973 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 13:45:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 13:45:57,001 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 13:45:57,001 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 13:45:57,002 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 13:45:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 13:45:57,005 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 13:45:57,007 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 13:45:57,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 01:45:57 BoogieIcfgContainer [2022-07-22 13:45:57,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 13:45:57,027 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 13:45:57,027 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 13:45:57,027 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 13:45:57,028 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:45:56" (3/4) ... [2022-07-22 13:45:57,029 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 13:45:57,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 13:45:57,030 INFO L158 Benchmark]: Toolchain (without parser) took 1010.77ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 63.8MB in the beginning and 73.0MB in the end (delta: -9.1MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-07-22 13:45:57,030 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 13:45:57,031 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.24ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 71.8MB in the end (delta: -8.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-07-22 13:45:57,031 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.04ms. Allocated memory is still 96.5MB. Free memory was 71.8MB in the beginning and 70.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 13:45:57,032 INFO L158 Benchmark]: Boogie Preprocessor took 15.91ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 68.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 13:45:57,032 INFO L158 Benchmark]: RCFGBuilder took 277.47ms. Allocated memory is still 96.5MB. Free memory was 68.5MB in the beginning and 57.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 13:45:57,032 INFO L158 Benchmark]: TraceAbstraction took 469.84ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 57.1MB in the beginning and 73.0MB in the end (delta: -15.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2022-07-22 13:45:57,033 INFO L158 Benchmark]: Witness Printer took 2.65ms. Allocated memory is still 117.4MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 13:45:57,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.24ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 71.8MB in the end (delta: -8.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.04ms. Allocated memory is still 96.5MB. Free memory was 71.8MB in the beginning and 70.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.91ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 68.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 277.47ms. Allocated memory is still 96.5MB. Free memory was 68.5MB in the beginning and 57.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 469.84ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 57.1MB in the beginning and 73.0MB in the end (delta: -15.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Witness Printer took 2.65ms. Allocated memory is still 117.4MB. Free memory is still 73.0MB. 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 80, overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someBinaryArithmeticFLOAToperation at line 66. Possible FailurePath: [L71] float a, b, c; [L72] int e; [L74] a = __VERIFIER_nondet_float() [L75] CALL assume_abort_if_not(a >= 1e-10 && a <= 1e10) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L75] RET assume_abort_if_not(a >= 1e-10 && a <= 1e10) [L77] CALL, EXPR FREXP(a, &e) [L25] int x; [L26] float r; [L27] CALL, EXPR FABS(d) [L19] COND TRUE d >= 0.f [L19] return d; VAL [\old(d)=51, \result=51, d=51] [L27] RET, EXPR FABS(d) [L27] float dd = FABS(d); [L29] COND TRUE dd >= 1.f [L30] x = 1 [L31] r = 2.f VAL [\old(d)=51, d=51, dd=51, e={5:0}, e={5:0}, r=2, x=1] [L32] COND FALSE !(r <= dd) VAL [\old(d)=51, d=51, dd=51, e={5:0}, e={5:0}, r=2, x=1] [L46] *e = x [L47] return dd / r; VAL [\old(d)=51, d=51, dd=51, e={5:0}, e={5:0}, r=2, x=1] [L77] RET, EXPR FREXP(a, &e) [L77] b = FREXP(a, &e) [L78] EXPR \read(e) [L78] CALL, EXPR LDEXP(b, e/2) [L52] float x = 1.; VAL [\old(d)=50, \old(e)=0, d=50, e=0, x=1] [L54] COND TRUE e >= 0 VAL [\old(d)=50, \old(e)=0, d=50, e=0, x=1] [L55] COND FALSE !(e > 0) VAL [\old(d)=50, \old(e)=0, d=50, e=0, x=1] [L66] return d * x; VAL [\old(d)=50, \old(e)=0, d=50, e=0, x=1] [L78] RET, EXPR LDEXP(b, e/2) [L78] c = LDEXP(b, e/2) [L80] CALL __VERIFIER_assert(c >= 0.f && c <= 1e6) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 74 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 55 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 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 [2022-07-22 13:45:57,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/exp_loop.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 8d8110300cda7d6230101fbf6f86509d455885849ba4fd2c9ffa62e45e5fbc59 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:45:58,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:45:58,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:45:58,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:45:58,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:45:58,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:45:58,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:45:58,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:45:58,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:45:58,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:45:58,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:45:58,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:45:58,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:45:58,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:45:58,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:45:58,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:45:58,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:45:58,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:45:58,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:45:58,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:45:58,755 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:45:58,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:45:58,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:45:58,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:45:58,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:45:58,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:45:58,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:45:58,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:45:58,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:45:58,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:45:58,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:45:58,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:45:58,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:45:58,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:45:58,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:45:58,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:45:58,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:45:58,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:45:58,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:45:58,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:45:58,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:45:58,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:45:58,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 13:45:58,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:45:58,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:45:58,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:45:58,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:45:58,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:45:58,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:45:58,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:45:58,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:45:58,803 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:45:58,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:45:58,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:45:58,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:45:58,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:45:58,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:45:58,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:45:58,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:45:58,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:45:58,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:45:58,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:45:58,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 13:45:58,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8110300cda7d6230101fbf6f86509d455885849ba4fd2c9ffa62e45e5fbc59 [2022-07-22 13:45:59,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:45:59,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:45:59,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:45:59,078 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:45:59,080 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:45:59,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/exp_loop.c [2022-07-22 13:45:59,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4154b90ac/6862206f4f064ae7b16198895e46bc1e/FLAGc4d41232d [2022-07-22 13:45:59,514 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:45:59,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/exp_loop.c [2022-07-22 13:45:59,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4154b90ac/6862206f4f064ae7b16198895e46bc1e/FLAGc4d41232d [2022-07-22 13:45:59,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4154b90ac/6862206f4f064ae7b16198895e46bc1e [2022-07-22 13:45:59,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:45:59,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:45:59,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:45:59,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:45:59,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:45:59,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4f9223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59, skipping insertion in model container [2022-07-22 13:45:59,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:45:59,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:45:59,689 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/exp_loop.c[587,600] [2022-07-22 13:45:59,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:45:59,757 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:45:59,770 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/exp_loop.c[587,600] [2022-07-22 13:45:59,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:45:59,800 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:45:59,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59 WrapperNode [2022-07-22 13:45:59,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:45:59,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:45:59,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:45:59,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:45:59,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,843 INFO L137 Inliner]: procedures = 21, calls = 17, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-07-22 13:45:59,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:45:59,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:45:59,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:45:59,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:45:59,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:45:59,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:45:59,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:45:59,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:45:59,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (1/1) ... [2022-07-22 13:45:59,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:45:59,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:45:59,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 13:45:59,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 13:45:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:45:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 13:45:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 13:45:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-22 13:45:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:45:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:45:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 13:45:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-22 13:45:59,988 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:45:59,990 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:46:02,189 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:46:02,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:46:02,193 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 13:46:02,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:46:02 BoogieIcfgContainer [2022-07-22 13:46:02,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:46:02,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:46:02,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:46:02,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:46:02,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:45:59" (1/3) ... [2022-07-22 13:46:02,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a561b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:46:02, skipping insertion in model container [2022-07-22 13:46:02,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:45:59" (2/3) ... [2022-07-22 13:46:02,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a561b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:46:02, skipping insertion in model container [2022-07-22 13:46:02,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:46:02" (3/3) ... [2022-07-22 13:46:02,199 INFO L111 eAbstractionObserver]: Analyzing ICFG exp_loop.c [2022-07-22 13:46:02,210 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:46:02,210 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:46:02,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:46:02,251 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78d4b7ce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b316576 [2022-07-22 13:46:02,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:46:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:46:02,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:46:02,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:46:02,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:46:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:46:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -250377569, now seen corresponding path program 1 times [2022-07-22 13:46:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:46:02,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205941204] [2022-07-22 13:46:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:46:02,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:46:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:46:02,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 13:46:02,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 13:46:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:46:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 13:46:02,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:46:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:46:02,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:46:02,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 13:46:02,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205941204] [2022-07-22 13:46:02,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205941204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:46:02,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:46:02,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:46:02,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893325305] [2022-07-22 13:46:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:46:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 13:46:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 13:46:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 13:46:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:46:02,570 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:46:02,583 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2022-07-22 13:46:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 13:46:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 16 [2022-07-22 13:46:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:46:02,590 INFO L225 Difference]: With dead ends: 45 [2022-07-22 13:46:02,590 INFO L226 Difference]: Without dead ends: 20 [2022-07-22 13:46:02,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:46:02,596 INFO L413 NwaCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:46:02,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:46:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-22 13:46:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-22 13:46:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-22 13:46:02,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 16 [2022-07-22 13:46:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:46:02,622 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 13:46:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-07-22 13:46:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:46:02,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:46:02,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:46:02,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 13:46:02,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 13:46:02,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:46:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:46:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1261494819, now seen corresponding path program 1 times [2022-07-22 13:46:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:46:02,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608962881] [2022-07-22 13:46:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:46:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:46:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:46:02,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 13:46:02,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 13:46:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:46:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 13:46:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:46:03,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 13:46:03,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-22 13:46:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:46:03,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:46:03,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 13:46:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608962881] [2022-07-22 13:46:03,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608962881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:46:03,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:46:03,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 13:46:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658611431] [2022-07-22 13:46:03,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:46:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 13:46:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 13:46:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 13:46:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:46:03,264 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:06,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 13:46:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:46:06,585 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-22 13:46:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 13:46:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2022-07-22 13:46:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:46:06,589 INFO L225 Difference]: With dead ends: 37 [2022-07-22 13:46:06,590 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 13:46:06,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:46:06,591 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 13:46:06,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 13:46:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 13:46:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-07-22 13:46:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-22 13:46:06,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2022-07-22 13:46:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:46:06,595 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-22 13:46:06,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-22 13:46:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 13:46:06,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:46:06,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:46:06,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 13:46:06,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 13:46:06,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:46:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:46:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1675232227, now seen corresponding path program 1 times [2022-07-22 13:46:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:46:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739853028] [2022-07-22 13:46:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:46:06,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:46:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:46:06,806 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) [2022-07-22 13:46:06,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 13:46:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:46:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 13:46:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:46:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:46:41,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:46:41,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 13:46:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739853028] [2022-07-22 13:46:41,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739853028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:46:41,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:46:41,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 13:46:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028980713] [2022-07-22 13:46:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:46:41,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 13:46:41,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 13:46:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 13:46:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-22 13:46:41,808 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:46:58,272 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 27 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:47:22,017 WARN L233 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 31 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:48:00,860 WARN L233 SmtUtils]: Spent 28.24s on a formula simplification. DAG size of input: 35 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:48:01,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 13:48:37,075 WARN L233 SmtUtils]: Spent 23.43s on a formula simplification. DAG size of input: 41 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:48:40,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 13:49:09,169 WARN L233 SmtUtils]: Spent 21.13s on a formula simplification. DAG size of input: 41 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:49:10,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 13:49:12,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 13:49:13,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 13:50:02,277 WARN L233 SmtUtils]: Spent 39.70s on a formula simplification. DAG size of input: 48 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 13:50:03,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 13:50:05,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 13:50:07,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 13:50:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:50:08,441 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-07-22 13:50:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 13:50:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 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 16 [2022-07-22 13:50:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:50:08,442 INFO L225 Difference]: With dead ends: 48 [2022-07-22 13:50:08,442 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 13:50:08,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 212.5s TimeCoverageRelationStatistics Valid=115, Invalid=304, Unknown=1, NotChecked=0, Total=420 [2022-07-22 13:50:08,444 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:50:08,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 45 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 2 Unknown, 47 Unchecked, 21.4s Time] [2022-07-22 13:50:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 13:50:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 13:50:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:50:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-07-22 13:50:08,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 16 [2022-07-22 13:50:08,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:50:08,450 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-07-22 13:50:08,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:50:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-07-22 13:50:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 13:50:08,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:50:08,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:50:08,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 13:50:08,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 13:50:08,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:50:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:50:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash -574750805, now seen corresponding path program 1 times [2022-07-22 13:50:08,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:50:08,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527492628] [2022-07-22 13:50:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:50:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:50:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:50:08,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 13:50:08,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 13:50:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:50:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 13:50:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:50:09,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 13:50:09,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-22 13:50:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:50:09,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:50:09,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 13:50:09,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527492628] [2022-07-22 13:50:09,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527492628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:50:09,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:50:09,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 13:50:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398384037] [2022-07-22 13:50:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:50:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 13:50:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 13:50:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 13:50:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:50:09,133 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2022-07-22 13:50:12,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 13:50:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:50:12,578 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 13:50:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 13:50:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) Word has length 17 [2022-07-22 13:50:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:50:12,585 INFO L225 Difference]: With dead ends: 39 [2022-07-22 13:50:12,585 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 13:50:12,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:50:12,586 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:50:12,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 74 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 13:50:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 13:50:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-07-22 13:50:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:50:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-22 13:50:12,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-07-22 13:50:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:50:12,590 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-22 13:50:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2022-07-22 13:50:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-22 13:50:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 13:50:12,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:50:12,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:50:12,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 13:50:12,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 13:50:12,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:50:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:50:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash -988488213, now seen corresponding path program 1 times [2022-07-22 13:50:12,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:50:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040471882] [2022-07-22 13:50:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:50:12,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:50:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:50:12,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 13:50:12,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 13:50:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:50:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 13:50:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates...