./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/freire2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/nla-digbench/freire2.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 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:19:29,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:19:29,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:19:29,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:19:29,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:19:29,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:19:29,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:19:29,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:19:29,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:19:29,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:19:29,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:19:29,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:19:29,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:19:29,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:19:29,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:19:29,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:19:29,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:19:29,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:19:29,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:19:29,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:19:29,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:19:29,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:19:29,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:19:29,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:19:29,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:19:29,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:19:29,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:19:29,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:19:29,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:19:29,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:19:29,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:19:29,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:19:29,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:19:29,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:19:29,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:19:29,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:19:29,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:19:29,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:19:29,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:19:29,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:19:29,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:19:29,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:19:29,482 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:19:29,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:19:29,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:19:29,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:19:29,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:19:29,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:19:29,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:19:29,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:19:29,485 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:19:29,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:19:29,486 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:19:29,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:19:29,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:19:29,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:19:29,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:19:29,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:19:29,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:19:29,487 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:19:29,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:19:29,488 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:19:29,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:19:29,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:19:29,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:19:29,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:19:29,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:19:29,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:19:29,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:19:29,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:19:29,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:19:29,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:19:29,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:19:29,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:19:29,491 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:19:29,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:19:29,491 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:19:29,491 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf [2023-02-15 11:19:29,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:19:29,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:19:29,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:19:29,760 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:19:29,760 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:19:29,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire2.c [2023-02-15 11:19:30,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:19:30,974 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:19:30,975 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c [2023-02-15 11:19:30,980 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033adf13d/551a3671787c4c0887ed791ec30ab2fc/FLAG306c30a19 [2023-02-15 11:19:30,993 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033adf13d/551a3671787c4c0887ed791ec30ab2fc [2023-02-15 11:19:30,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:19:30,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:19:30,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:19:30,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:19:31,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:19:31,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:19:30" (1/1) ... [2023-02-15 11:19:31,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1ee7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31, skipping insertion in model container [2023-02-15 11:19:31,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:19:30" (1/1) ... [2023-02-15 11:19:31,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:19:31,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:19:31,146 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2023-02-15 11:19:31,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:19:31,171 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:19:31,182 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2023-02-15 11:19:31,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:19:31,216 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:19:31,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31 WrapperNode [2023-02-15 11:19:31,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:19:31,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:19:31,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:19:31,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:19:31,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,254 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-15 11:19:31,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:19:31,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:19:31,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:19:31,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:19:31,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:19:31,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:19:31,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:19:31,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:19:31,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (1/1) ... [2023-02-15 11:19:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:19:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:19:31,301 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) [2023-02-15 11:19:31,303 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 [2023-02-15 11:19:31,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:19:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:19:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:19:31,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:19:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:19:31,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:19:31,393 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:19:31,395 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:19:31,565 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:19:31,571 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:19:31,571 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:19:31,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:19:31 BoogieIcfgContainer [2023-02-15 11:19:31,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:19:31,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:19:31,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:19:31,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:19:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:19:30" (1/3) ... [2023-02-15 11:19:31,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44890130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:19:31, skipping insertion in model container [2023-02-15 11:19:31,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:31" (2/3) ... [2023-02-15 11:19:31,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44890130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:19:31, skipping insertion in model container [2023-02-15 11:19:31,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:19:31" (3/3) ... [2023-02-15 11:19:31,598 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2.c [2023-02-15 11:19:31,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:19:31,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:19:31,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:19:31,689 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ca912d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:19:31,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:19:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:19:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:19:31,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:19:31,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:19:31,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:19:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:19:31,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1820892643, now seen corresponding path program 1 times [2023-02-15 11:19:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:19:31,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628797108] [2023-02-15 11:19:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:19:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:19:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:19:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628797108] [2023-02-15 11:19:31,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:19:31,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777931055] [2023-02-15 11:19:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:31,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:19:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:19:31,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:19:31,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:19:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:19:31,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:19:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:19:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:19:31,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:19:31,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777931055] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:19:31,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:19:31,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:19:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821042703] [2023-02-15 11:19:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:19:31,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:19:31,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:19:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:19:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:19:31,924 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:19:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:19:31,949 INFO L93 Difference]: Finished difference Result 38 states and 60 transitions. [2023-02-15 11:19:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:19:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 11:19:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:19:31,957 INFO L225 Difference]: With dead ends: 38 [2023-02-15 11:19:31,957 INFO L226 Difference]: Without dead ends: 16 [2023-02-15 11:19:31,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:19:31,969 INFO L413 NwaCegarLoop]: 25 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, 25 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 [2023-02-15 11:19:31,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:19:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-15 11:19:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-15 11:19:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:19:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-02-15 11:19:32,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 7 [2023-02-15 11:19:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:19:32,024 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-02-15 11:19:32,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:19:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-02-15 11:19:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:19:32,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:19:32,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:19:32,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 11:19:32,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 11:19:32,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:19:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:19:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1811478687, now seen corresponding path program 1 times [2023-02-15 11:19:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:19:32,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703633171] [2023-02-15 11:19:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:19:32,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:19:32,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697319205] [2023-02-15 11:19:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:32,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:19:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:19:32,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:19:32,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:19:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:19:32,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:19:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:19:32,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 11:19:32,317 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 11:19:32,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 11:19:32,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:19:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 11:19:32,528 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-02-15 11:19:32,531 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 11:19:32,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:19:32 BoogieIcfgContainer [2023-02-15 11:19:32,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 11:19:32,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 11:19:32,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 11:19:32,554 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 11:19:32,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:19:31" (3/4) ... [2023-02-15 11:19:32,556 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 11:19:32,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 11:19:32,557 INFO L158 Benchmark]: Toolchain (without parser) took 1561.47ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 55.6MB in the end (delta: 16.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2023-02-15 11:19:32,557 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:19:32,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.83ms. Allocated memory is still 109.1MB. Free memory was 72.3MB in the beginning and 61.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:19:32,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.90ms. Allocated memory is still 109.1MB. Free memory was 61.6MB in the beginning and 60.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:19:32,559 INFO L158 Benchmark]: Boogie Preprocessor took 20.93ms. Allocated memory is still 109.1MB. Free memory was 60.2MB in the beginning and 59.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:19:32,559 INFO L158 Benchmark]: RCFGBuilder took 296.47ms. Allocated memory is still 109.1MB. Free memory was 58.8MB in the beginning and 48.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:19:32,560 INFO L158 Benchmark]: TraceAbstraction took 977.95ms. Allocated memory is still 109.1MB. Free memory was 48.3MB in the beginning and 56.0MB in the end (delta: -7.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:19:32,560 INFO L158 Benchmark]: Witness Printer took 3.34ms. Allocated memory is still 109.1MB. Free memory was 56.0MB in the beginning and 55.6MB in the end (delta: 376.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:19:32,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.83ms. Allocated memory is still 109.1MB. Free memory was 72.3MB in the beginning and 61.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.90ms. Allocated memory is still 109.1MB. Free memory was 61.6MB in the beginning and 60.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.93ms. Allocated memory is still 109.1MB. Free memory was 60.2MB in the beginning and 59.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 296.47ms. Allocated memory is still 109.1MB. Free memory was 58.8MB in the beginning and 48.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 977.95ms. Allocated memory is still 109.1MB. Free memory was 48.3MB in the beginning and 56.0MB in the end (delta: -7.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.34ms. Allocated memory is still 109.1MB. Free memory was 56.0MB in the beginning and 55.6MB in the end (delta: 376.3kB). 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: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L32] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 25 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-15 11:19:32,578 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/nla-digbench/freire2.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 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:19:34,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:19:34,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:19:34,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:19:34,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:19:34,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:19:34,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:19:34,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:19:34,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:19:34,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:19:34,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:19:34,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:19:34,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:19:34,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:19:34,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:19:34,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:19:34,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:19:34,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:19:34,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:19:34,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:19:34,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:19:34,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:19:34,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:19:34,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:19:34,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:19:34,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:19:34,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:19:34,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:19:34,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:19:34,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:19:34,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:19:34,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:19:34,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:19:34,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:19:34,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:19:34,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:19:34,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:19:34,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:19:34,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:19:34,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:19:34,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:19:34,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 11:19:34,694 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:19:34,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:19:34,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:19:34,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:19:34,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:19:34,697 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:19:34,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:19:34,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:19:34,697 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:19:34,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:19:34,699 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:19:34,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:19:34,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:19:34,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:19:34,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:19:34,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:19:34,700 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 11:19:34,700 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 11:19:34,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 11:19:34,700 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:19:34,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:19:34,701 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:19:34,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:19:34,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:19:34,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:19:34,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:19:34,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:19:34,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:19:34,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:19:34,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:19:34,703 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 11:19:34,703 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 11:19:34,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:19:34,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:19:34,703 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:19:34,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:19:34,704 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 11:19:34,704 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:19:34,704 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf [2023-02-15 11:19:34,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:19:34,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:19:34,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:19:34,992 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:19:34,993 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:19:34,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire2.c [2023-02-15 11:19:36,195 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:19:36,449 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:19:36,450 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c [2023-02-15 11:19:36,455 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccaedffcd/04876ed042504a9eaf0c51dd0c237333/FLAG225dbd7a6 [2023-02-15 11:19:36,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccaedffcd/04876ed042504a9eaf0c51dd0c237333 [2023-02-15 11:19:36,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:19:36,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:19:36,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:19:36,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:19:36,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:19:36,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ed5bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36, skipping insertion in model container [2023-02-15 11:19:36,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:19:36,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:19:36,643 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2023-02-15 11:19:36,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:19:36,679 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:19:36,690 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2023-02-15 11:19:36,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:19:36,721 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:19:36,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36 WrapperNode [2023-02-15 11:19:36,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:19:36,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:19:36,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:19:36,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:19:36,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,760 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2023-02-15 11:19:36,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:19:36,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:19:36,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:19:36,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:19:36,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:19:36,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:19:36,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:19:36,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:19:36,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (1/1) ... [2023-02-15 11:19:36,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:19:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:19:36,825 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) [2023-02-15 11:19:36,853 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 [2023-02-15 11:19:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:19:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 11:19:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:19:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:19:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:19:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:19:36,926 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:19:36,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:19:39,307 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:19:39,312 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:19:39,312 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:19:39,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:19:39 BoogieIcfgContainer [2023-02-15 11:19:39,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:19:39,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:19:39,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:19:39,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:19:39,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:19:36" (1/3) ... [2023-02-15 11:19:39,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aedf24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:19:39, skipping insertion in model container [2023-02-15 11:19:39,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:19:36" (2/3) ... [2023-02-15 11:19:39,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aedf24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:19:39, skipping insertion in model container [2023-02-15 11:19:39,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:19:39" (3/3) ... [2023-02-15 11:19:39,342 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2.c [2023-02-15 11:19:39,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:19:39,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:19:39,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:19:39,430 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28ab07f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:19:39,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:19:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:19:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:19:39,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:19:39,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:19:39,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:19:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:19:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1820892643, now seen corresponding path program 1 times [2023-02-15 11:19:39,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:19:39,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559603367] [2023-02-15 11:19:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 11:19:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:19:39,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 11:19:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-15 11:19:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:19:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:19:39,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:19:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:19:39,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:19:39,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:19:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559603367] [2023-02-15 11:19:39,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559603367] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:19:39,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:19:39,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:19:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220363161] [2023-02-15 11:19:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:19:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:19:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:19:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:19:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:19:39,685 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:19:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:19:39,712 INFO L93 Difference]: Finished difference Result 38 states and 60 transitions. [2023-02-15 11:19:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:19:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 11:19:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:19:39,726 INFO L225 Difference]: With dead ends: 38 [2023-02-15 11:19:39,727 INFO L226 Difference]: Without dead ends: 16 [2023-02-15 11:19:39,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:19:39,734 INFO L413 NwaCegarLoop]: 25 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, 25 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 [2023-02-15 11:19:39,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:19:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-15 11:19:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-15 11:19:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:19:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-02-15 11:19:39,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 7 [2023-02-15 11:19:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:19:39,770 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-02-15 11:19:39,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:19:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-02-15 11:19:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:19:39,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:19:39,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:19:39,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:19:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 11:19:39,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:19:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:19:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1811478687, now seen corresponding path program 1 times [2023-02-15 11:19:39,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:19:39,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054895637] [2023-02-15 11:19:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:39,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 11:19:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:19:39,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 11:19:39,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-15 11:19:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:19:40,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:19:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:19:40,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:19:40,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1652413101] [2023-02-15 11:19:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:19:40,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:19:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:19:40,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 11:19:40,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-02-15 11:19:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:19:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:19:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:19:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:19:40,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:19:40,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:19:40,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054895637] [2023-02-15 11:19:40,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:19:40,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652413101] [2023-02-15 11:19:40,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652413101] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:19:40,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:19:40,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:19:40,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784724376] [2023-02-15 11:19:40,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:19:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:19:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:19:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:19:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:19:40,538 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:19:43,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:45,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:47,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:49,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:51,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:53,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:19:58,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:00,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:02,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:04,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:06,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:09,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:11,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:13,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:15,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:17,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:19,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:21,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:24,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:26,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:28,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:30,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:33,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:35,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:20:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:20:35,241 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-02-15 11:20:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:20:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 11:20:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:20:35,363 INFO L225 Difference]: With dead ends: 39 [2023-02-15 11:20:35,363 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 11:20:35,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:20:35,365 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:20:35,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 54.6s Time] [2023-02-15 11:20:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 11:20:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-02-15 11:20:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 11:20:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-02-15 11:20:35,379 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 7 [2023-02-15 11:20:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:20:35,380 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-02-15 11:20:35,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:20:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-02-15 11:20:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 11:20:35,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:20:35,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:20:35,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-02-15 11:20:35,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:20:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 11:20:35,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:20:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:20:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1549807104, now seen corresponding path program 1 times [2023-02-15 11:20:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:20:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688769250] [2023-02-15 11:20:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:20:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 11:20:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:20:35,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 11:20:35,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-15 11:20:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:20:36,034 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:20:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:20:36,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:20:36,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2087297728] [2023-02-15 11:20:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:20:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:20:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:20:36,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 11:20:36,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-02-15 11:20:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:20:36,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:20:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat