./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/array-fpi/ifeqn4f.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 7849780e572f4b715fd4a0599e2552ba9e578b3aff0bf5f111ebb8575b54953d --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:22:25,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:22:25,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:22:25,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:22:25,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:22:25,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:22:25,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:22:25,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:22:25,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:22:25,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:22:25,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:22:25,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:22:25,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:22:25,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:22:25,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:22:25,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:22:25,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:22:25,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:22:25,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:22:25,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:22:25,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:22:25,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:22:25,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:22:25,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:22:25,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:22:25,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:22:25,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:22:25,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:22:25,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:22:25,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:22:25,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:22:25,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:22:25,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:22:25,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:22:25,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:22:25,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:22:25,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:22:25,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:22:25,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:22:25,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:22:25,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:22:25,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:22:25,974 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:22:25,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:22:25,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:22:25,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:22:25,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:22:25,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:22:25,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:22:25,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:22:25,978 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:22:25,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:22:25,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:22:25,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:22:25,980 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:22:25,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:22:25,980 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:22:25,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:22:25,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:22:25,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:22:25,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:22:25,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:22:25,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:22:25,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:22:25,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:22:25,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:22:25,983 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:22:25,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7849780e572f4b715fd4a0599e2552ba9e578b3aff0bf5f111ebb8575b54953d [2023-02-16 00:22:26,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:22:26,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:22:26,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:22:26,166 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:22:26,166 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:22:26,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4f.c [2023-02-16 00:22:27,264 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:22:27,404 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:22:27,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c [2023-02-16 00:22:27,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783bb326d/7e9d5a42097d48ca8b3c03f4b8156ac9/FLAG807c7fe26 [2023-02-16 00:22:27,424 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783bb326d/7e9d5a42097d48ca8b3c03f4b8156ac9 [2023-02-16 00:22:27,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:22:27,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:22:27,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:22:27,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:22:27,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:22:27,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6361f014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27, skipping insertion in model container [2023-02-16 00:22:27,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:22:27,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:22:27,543 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/array-fpi/ifeqn4f.c[590,603] [2023-02-16 00:22:27,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:22:27,568 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:22:27,578 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/array-fpi/ifeqn4f.c[590,603] [2023-02-16 00:22:27,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:22:27,603 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:22:27,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27 WrapperNode [2023-02-16 00:22:27,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:22:27,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:22:27,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:22:27,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:22:27,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,637 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-16 00:22:27,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:22:27,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:22:27,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:22:27,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:22:27,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:22:27,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:22:27,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:22:27,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:22:27,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (1/1) ... [2023-02-16 00:22:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:22:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:27,699 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) [2023-02-16 00:22:27,704 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 [2023-02-16 00:22:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:22:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:22:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:22:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:22:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:22:27,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:22:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:22:27,806 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:22:27,808 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:22:27,995 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:22:27,999 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:22:28,006 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 00:22:28,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:22:28 BoogieIcfgContainer [2023-02-16 00:22:28,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:22:28,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:22:28,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:22:28,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:22:28,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:22:27" (1/3) ... [2023-02-16 00:22:28,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6949d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:22:28, skipping insertion in model container [2023-02-16 00:22:28,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:22:27" (2/3) ... [2023-02-16 00:22:28,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6949d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:22:28, skipping insertion in model container [2023-02-16 00:22:28,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:22:28" (3/3) ... [2023-02-16 00:22:28,014 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2023-02-16 00:22:28,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:22:28,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:22:28,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:22:28,098 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;@2b76598e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:22:28,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:22:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:22:28,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:28,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:28,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-16 00:22:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505251600] [2023-02-16 00:22:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:28,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505251600] [2023-02-16 00:22:28,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 00:22:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074183013] [2023-02-16 00:22:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:28,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:28,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:28,246 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) [2023-02-16 00:22:28,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:22:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 00:22:28,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:22:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:22:28,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:22:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074183013] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:22:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:22:28,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:22:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648561930] [2023-02-16 00:22:28,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:22:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:22:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:22:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:22:28,392 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:22:28,405 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-16 00:22:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:22:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 00:22:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:22:28,412 INFO L225 Difference]: With dead ends: 42 [2023-02-16 00:22:28,412 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 00:22:28,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:22:28,418 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-02-16 00:22:28,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:22:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 00:22:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 00:22:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-16 00:22:28,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-16 00:22:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:22:28,443 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-16 00:22:28,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-16 00:22:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:22:28,444 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:28,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:28,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 00:22:28,652 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 [2023-02-16 00:22:28,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-16 00:22:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:28,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743536584] [2023-02-16 00:22:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743536584] [2023-02-16 00:22:28,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 00:22:28,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860594085] [2023-02-16 00:22:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:28,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:28,729 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) [2023-02-16 00:22:28,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:22:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 00:22:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:22:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:22:28,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:22:28,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860594085] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:22:28,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:22:28,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:22:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424034204] [2023-02-16 00:22:28,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:22:28,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:22:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:22:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:22:28,861 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:22:28,905 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-16 00:22:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:22:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 00:22:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:22:28,906 INFO L225 Difference]: With dead ends: 42 [2023-02-16 00:22:28,907 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 00:22:28,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:22:28,908 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:22:28,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:22:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 00:22:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-16 00:22:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-16 00:22:28,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-16 00:22:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:22:28,912 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-16 00:22:28,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-16 00:22:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 00:22:28,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:28,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:28,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 00:22:29,117 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 [2023-02-16 00:22:29,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-16 00:22:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:29,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793260071] [2023-02-16 00:22:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:29,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:22:29,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461096489] [2023-02-16 00:22:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:29,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:22:29,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:22:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 00:22:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:22:29,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 00:22:29,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-16 00:22:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:22:29,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:22:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:29,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793260071] [2023-02-16 00:22:29,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:22:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461096489] [2023-02-16 00:22:29,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461096489] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:22:29,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:22:29,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 00:22:29,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130201487] [2023-02-16 00:22:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:22:29,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 00:22:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 00:22:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 00:22:29,294 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:22:29,367 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-16 00:22:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:22:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 00:22:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:22:29,368 INFO L225 Difference]: With dead ends: 39 [2023-02-16 00:22:29,368 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 00:22:29,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:22:29,369 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:22:29,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:22:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 00:22:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-02-16 00:22:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-16 00:22:29,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 18 [2023-02-16 00:22:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:22:29,374 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-16 00:22:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-16 00:22:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 00:22:29,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:29,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:29,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:22:29,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:29,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-16 00:22:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:29,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455322308] [2023-02-16 00:22:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:29,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455322308] [2023-02-16 00:22:29,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 00:22:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151184420] [2023-02-16 00:22:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:29,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:22:29,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:22:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 00:22:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:22:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:22:29,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:22:29,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151184420] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:22:29,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:22:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:22:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838325769] [2023-02-16 00:22:29,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:22:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:22:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:22:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:22:29,666 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:22:29,709 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-02-16 00:22:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:22:29,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 00:22:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:22:29,710 INFO L225 Difference]: With dead ends: 50 [2023-02-16 00:22:29,710 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 00:22:29,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:22:29,711 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:22:29,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:22:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 00:22:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2023-02-16 00:22:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-16 00:22:29,714 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-02-16 00:22:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:22:29,714 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-16 00:22:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-16 00:22:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 00:22:29,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:29,715 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:29,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 00:22:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:29,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash -748772581, now seen corresponding path program 1 times [2023-02-16 00:22:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074086703] [2023-02-16 00:22:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:29,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:22:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750649723] [2023-02-16 00:22:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:29,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:29,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:22:29,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 00:22:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:22:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:22:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:22:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:22:30,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:22:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:22:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074086703] [2023-02-16 00:22:30,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:22:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750649723] [2023-02-16 00:22:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750649723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:22:30,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:22:30,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 00:22:30,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656324252] [2023-02-16 00:22:30,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:22:30,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:22:30,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:22:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:22:30,082 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:22:30,154 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-02-16 00:22:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:22:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 00:22:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:22:30,155 INFO L225 Difference]: With dead ends: 65 [2023-02-16 00:22:30,155 INFO L226 Difference]: Without dead ends: 41 [2023-02-16 00:22:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:22:30,156 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:22:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:22:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-16 00:22:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-02-16 00:22:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-16 00:22:30,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2023-02-16 00:22:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:22:30,160 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-16 00:22:30,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:22:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-16 00:22:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 00:22:30,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:22:30,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:22:30,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 00:22:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:30,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:22:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:22:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-16 00:22:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:22:30,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666120133] [2023-02-16 00:22:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:22:30,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:22:30,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524829813] [2023-02-16 00:22:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:22:30,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:22:30,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:22:30,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 00:22:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 00:22:30,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 00:22:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 00:22:30,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 00:22:30,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-16 00:22:30,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 00:22:30,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 00:22:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:22:30,690 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-02-16 00:22:30,692 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 00:22:30,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 12:22:30 BoogieIcfgContainer [2023-02-16 00:22:30,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 00:22:30,714 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 00:22:30,714 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 00:22:30,714 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 00:22:30,714 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:22:28" (3/4) ... [2023-02-16 00:22:30,715 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-16 00:22:30,742 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 00:22:30,742 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 00:22:30,743 INFO L158 Benchmark]: Toolchain (without parser) took 3315.76ms. Allocated memory was 157.3MB in the beginning and 205.5MB in the end (delta: 48.2MB). Free memory was 109.0MB in the beginning and 91.3MB in the end (delta: 17.8MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,743 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 00:22:30,743 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.38ms. Allocated memory is still 157.3MB. Free memory was 108.7MB in the beginning and 98.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,743 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.95ms. Allocated memory is still 157.3MB. Free memory was 98.2MB in the beginning and 96.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,743 INFO L158 Benchmark]: Boogie Preprocessor took 34.45ms. Allocated memory is still 157.3MB. Free memory was 96.5MB in the beginning and 95.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,743 INFO L158 Benchmark]: RCFGBuilder took 335.20ms. Allocated memory is still 157.3MB. Free memory was 95.2MB in the beginning and 83.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,744 INFO L158 Benchmark]: TraceAbstraction took 2703.74ms. Allocated memory was 157.3MB in the beginning and 205.5MB in the end (delta: 48.2MB). Free memory was 82.2MB in the beginning and 93.4MB in the end (delta: -11.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,744 INFO L158 Benchmark]: Witness Printer took 28.48ms. Allocated memory is still 205.5MB. Free memory was 93.4MB in the beginning and 91.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:22:30,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.38ms. Allocated memory is still 157.3MB. Free memory was 108.7MB in the beginning and 98.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.95ms. Allocated memory is still 157.3MB. Free memory was 98.2MB in the beginning and 96.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.45ms. Allocated memory is still 157.3MB. Free memory was 96.5MB in the beginning and 95.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 335.20ms. Allocated memory is still 157.3MB. Free memory was 95.2MB in the beginning and 83.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2703.74ms. Allocated memory was 157.3MB in the beginning and 205.5MB in the end (delta: 48.2MB). Free memory was 82.2MB in the beginning and 93.4MB in the end (delta: -11.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * Witness Printer took 28.48ms. Allocated memory is still 205.5MB. Free memory was 93.4MB in the beginning and 91.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [a={-2:0}, b={-1:0}, i=0, N=2] [L31] COND TRUE i