./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/recursive/Ackermann01-2.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 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:26:31,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:26:31,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:26:31,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:26:31,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:26:31,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:26:31,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:26:31,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:26:31,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:26:31,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:26:31,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:26:31,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:26:31,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:26:31,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:26:31,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:26:31,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:26:31,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:26:31,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:26:31,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:26:31,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:26:31,848 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:26:31,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:26:31,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:26:31,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:26:31,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:26:31,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:26:31,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:26:31,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:26:31,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:26:31,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:26:31,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:26:31,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:26:31,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:26:31,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:26:31,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:26:31,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:26:31,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:26:31,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:26:31,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:26:31,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:26:31,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:26:31,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:26:31,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:26:31,896 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:26:31,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:26:31,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:26:31,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:26:31,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:26:31,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:26:31,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:26:31,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:26:31,898 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:26:31,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:26:31,898 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:26:31,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:26:31,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:26:31,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:26:31,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:26:31,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:26:31,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:26:31,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:26:31,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:31,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:26:31,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2022-07-19 17:26:32,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:26:32,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:26:32,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:26:32,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:26:32,152 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:26:32,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann01-2.c [2022-07-19 17:26:32,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c158bbb9/33b5f5bf68b74f3d842742d94c27d5fc/FLAG4c298d234 [2022-07-19 17:26:32,581 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:26:32,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c [2022-07-19 17:26:32,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c158bbb9/33b5f5bf68b74f3d842742d94c27d5fc/FLAG4c298d234 [2022-07-19 17:26:33,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c158bbb9/33b5f5bf68b74f3d842742d94c27d5fc [2022-07-19 17:26:33,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:26:33,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:26:33,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:33,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:26:33,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:26:33,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4849a62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33, skipping insertion in model container [2022-07-19 17:26:33,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:26:33,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:26:33,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-07-19 17:26:33,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:33,183 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:26:33,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-07-19 17:26:33,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:33,229 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:26:33,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33 WrapperNode [2022-07-19 17:26:33,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:33,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:33,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:26:33,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:26:33,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,259 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-19 17:26:33,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:33,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:26:33,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:26:33,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:26:33,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:26:33,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:26:33,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:26:33,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:26:33,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (1/1) ... [2022-07-19 17:26:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:33,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:26:33,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:26:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:26:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:26:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:26:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-07-19 17:26:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-07-19 17:26:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:26:33,419 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:26:33,420 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:26:33,526 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:26:33,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:26:33,532 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:26:33,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:33 BoogieIcfgContainer [2022-07-19 17:26:33,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:26:33,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:26:33,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:26:33,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:26:33,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:26:33" (1/3) ... [2022-07-19 17:26:33,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6c1973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:33, skipping insertion in model container [2022-07-19 17:26:33,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:33" (2/3) ... [2022-07-19 17:26:33,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6c1973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:33, skipping insertion in model container [2022-07-19 17:26:33,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:33" (3/3) ... [2022-07-19 17:26:33,542 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2022-07-19 17:26:33,555 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:26:33,555 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:26:33,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:26:33,611 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@dbae71, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40a9ad8a [2022-07-19 17:26:33,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:26:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 17:26:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 17:26:33,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:33,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:33,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2022-07-19 17:26:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:33,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601018622] [2022-07-19 17:26:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:26:33,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:33,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601018622] [2022-07-19 17:26:33,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601018622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:33,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:33,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:26:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453892204] [2022-07-19 17:26:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:26:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:26:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:33,952 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:26:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:34,083 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-07-19 17:26:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-19 17:26:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:34,093 INFO L225 Difference]: With dead ends: 38 [2022-07-19 17:26:34,093 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 17:26:34,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-19 17:26:34,099 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:34,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 17:26:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 17:26:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 17:26:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-07-19 17:26:34,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-07-19 17:26:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:34,150 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-07-19 17:26:34,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:26:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-07-19 17:26:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 17:26:34,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:34,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:34,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:26:34,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2022-07-19 17:26:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064685905] [2022-07-19 17:26:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:26:34,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064685905] [2022-07-19 17:26:34,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064685905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:34,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:34,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 17:26:34,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184260111] [2022-07-19 17:26:34,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:34,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 17:26:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 17:26:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:26:34,278 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 17:26:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:34,420 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-19 17:26:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 17:26:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 17:26:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:34,433 INFO L225 Difference]: With dead ends: 29 [2022-07-19 17:26:34,433 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 17:26:34,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:26:34,435 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:34,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 17:26:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-19 17:26:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 17:26:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-19 17:26:34,446 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2022-07-19 17:26:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:34,447 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-19 17:26:34,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 17:26:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-19 17:26:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 17:26:34,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:34,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:26:34,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:34,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash -445405100, now seen corresponding path program 1 times [2022-07-19 17:26:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:34,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582006746] [2022-07-19 17:26:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 17:26:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 17:26:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582006746] [2022-07-19 17:26:34,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582006746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285781382] [2022-07-19 17:26:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:34,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:34,592 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) [2022-07-19 17:26:34,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:26:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:26:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 17:26:34,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 17:26:34,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285781382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:34,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:34,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-07-19 17:26:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309244103] [2022-07-19 17:26:34,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:34,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 17:26:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 17:26:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:26:34,961 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 17:26:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:35,116 INFO L93 Difference]: Finished difference Result 48 states and 75 transitions. [2022-07-19 17:26:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 17:26:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2022-07-19 17:26:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:35,132 INFO L225 Difference]: With dead ends: 48 [2022-07-19 17:26:35,132 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 17:26:35,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:26:35,137 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:35,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 85 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 17:26:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-07-19 17:26:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-19 17:26:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-19 17:26:35,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2022-07-19 17:26:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:35,160 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-19 17:26:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 17:26:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-19 17:26:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 17:26:35,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:35,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:35,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 17:26:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:35,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2022-07-19 17:26:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:35,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662788142] [2022-07-19 17:26:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:35,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:26:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:26:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662788142] [2022-07-19 17:26:35,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662788142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336707317] [2022-07-19 17:26:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:35,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:35,636 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) [2022-07-19 17:26:35,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:26:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 17:26:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 17:26:35,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:26:36,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336707317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:36,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:36,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2022-07-19 17:26:36,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729280642] [2022-07-19 17:26:36,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 17:26:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 17:26:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-07-19 17:26:36,271 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:26:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:36,752 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-07-19 17:26:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 17:26:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 32 [2022-07-19 17:26:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:36,759 INFO L225 Difference]: With dead ends: 57 [2022-07-19 17:26:36,759 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 17:26:36,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 17:26:36,766 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:36,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 164 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 17:26:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 17:26:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-07-19 17:26:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2022-07-19 17:26:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2022-07-19 17:26:36,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 32 [2022-07-19 17:26:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:36,790 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2022-07-19 17:26:36,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:26:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2022-07-19 17:26:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 17:26:36,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:36,791 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:36,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 17:26:36,992 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,SelfDestructingSolverStorable3 [2022-07-19 17:26:36,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 372648096, now seen corresponding path program 2 times [2022-07-19 17:26:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:36,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298346851] [2022-07-19 17:26:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:26:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 17:26:37,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:37,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298346851] [2022-07-19 17:26:37,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298346851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:37,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084943092] [2022-07-19 17:26:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:26:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:37,188 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) [2022-07-19 17:26:37,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:26:37,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:26:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:26:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 17:26:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 17:26:37,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 17:26:37,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084943092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:37,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:37,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2022-07-19 17:26:37,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826169378] [2022-07-19 17:26:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 17:26:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 17:26:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-19 17:26:37,688 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 17:26:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:37,996 INFO L93 Difference]: Finished difference Result 96 states and 220 transitions. [2022-07-19 17:26:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 17:26:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 46 [2022-07-19 17:26:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:37,998 INFO L225 Difference]: With dead ends: 96 [2022-07-19 17:26:37,998 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 17:26:38,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-07-19 17:26:38,001 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:38,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 118 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 17:26:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-07-19 17:26:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (57), 17 states have call predecessors, (57), 9 states have call successors, (57) [2022-07-19 17:26:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2022-07-19 17:26:38,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 46 [2022-07-19 17:26:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:38,014 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2022-07-19 17:26:38,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 17:26:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2022-07-19 17:26:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 17:26:38,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:38,017 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:38,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 17:26:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:38,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -558645120, now seen corresponding path program 3 times [2022-07-19 17:26:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086202124] [2022-07-19 17:26:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:38,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:26:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 17:26:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:26:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 136 proven. 61 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-19 17:26:38,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:38,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086202124] [2022-07-19 17:26:38,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086202124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:38,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927891401] [2022-07-19 17:26:38,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:26:38,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:38,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:38,555 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) [2022-07-19 17:26:38,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:26:38,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 17:26:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:26:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 17:26:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 112 proven. 20 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-19 17:26:38,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-19 17:26:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927891401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:40,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 32 [2022-07-19 17:26:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872586892] [2022-07-19 17:26:40,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 17:26:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 17:26:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-07-19 17:26:40,352 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (26), 19 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-19 17:26:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:41,611 INFO L93 Difference]: Finished difference Result 153 states and 443 transitions. [2022-07-19 17:26:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 17:26:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (26), 19 states have call predecessors, (26), 6 states have call successors, (26) Word has length 86 [2022-07-19 17:26:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:41,612 INFO L225 Difference]: With dead ends: 153 [2022-07-19 17:26:41,612 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 17:26:41,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=3517, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 17:26:41,616 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:41,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 173 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:26:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 17:26:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 17:26:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:26:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 17:26:41,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-07-19 17:26:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:41,618 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 17:26:41,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (26), 19 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-19 17:26:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 17:26:41,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 17:26:41,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 17:26:41,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:26:41,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:41,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 17:26:42,118 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 17:26:42,118 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L902 garLoopResultBuilder]: At program point L28(lines 28 48) the Hoare annotation is: true [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 47) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (<= 0 |ULTIMATE.start_main_~n~0#1|) [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 41) no Hoare annotation was computed. [2022-07-19 17:26:42,119 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0)) (<= |ackermann_#in~n| 0)) [2022-07-19 17:26:42,120 INFO L895 garLoopResultBuilder]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 0 (+ |ackermann_#t~ret5| 1)) (<= 2 |ackermann_#in~m|) .cse0 .cse1) (and .cse0 (<= 2 |ackermann_#t~ret5|) (<= 1 |ackermann_#in~m|) .cse1))) [2022-07-19 17:26:42,120 INFO L902 garLoopResultBuilder]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point L24-3(line 24) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-19 17:26:42,120 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2022-07-19 17:26:42,123 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-07-19 17:26:42,125 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 17:26:42,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 05:26:42 BoogieIcfgContainer [2022-07-19 17:26:42,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 17:26:42,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 17:26:42,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 17:26:42,134 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 17:26:42,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:33" (3/4) ... [2022-07-19 17:26:42,138 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 17:26:42,144 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2022-07-19 17:26:42,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 17:26:42,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-19 17:26:42,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 17:26:42,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 17:26:42,183 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 17:26:42,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 17:26:42,184 INFO L158 Benchmark]: Toolchain (without parser) took 9165.63ms. Allocated memory was 83.9MB in the beginning and 121.6MB in the end (delta: 37.7MB). Free memory was 49.9MB in the beginning and 87.7MB in the end (delta: -37.8MB). Peak memory consumption was 565.6kB. Max. memory is 16.1GB. [2022-07-19 17:26:42,184 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory was 56.4MB in the beginning and 56.4MB in the end (delta: 26.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:26:42,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.72ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 49.8MB in the beginning and 77.4MB in the end (delta: -27.6MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-19 17:26:42,185 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.64ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 76.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:26:42,185 INFO L158 Benchmark]: Boogie Preprocessor took 31.51ms. Allocated memory is still 100.7MB. Free memory was 76.0MB in the beginning and 75.0MB in the end (delta: 973.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:26:42,185 INFO L158 Benchmark]: RCFGBuilder took 241.11ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 65.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 17:26:42,186 INFO L158 Benchmark]: TraceAbstraction took 8598.01ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 64.9MB in the beginning and 89.8MB in the end (delta: -24.9MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2022-07-19 17:26:42,186 INFO L158 Benchmark]: Witness Printer took 48.99ms. Allocated memory is still 121.6MB. Free memory was 89.8MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 17:26:42,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory was 56.4MB in the beginning and 56.4MB in the end (delta: 26.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.72ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 49.8MB in the beginning and 77.4MB in the end (delta: -27.6MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.64ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 76.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.51ms. Allocated memory is still 100.7MB. Free memory was 76.0MB in the beginning and 75.0MB in the end (delta: 973.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 241.11ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 65.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8598.01ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 64.9MB in the beginning and 89.8MB in the end (delta: -24.9MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * Witness Printer took 48.99ms. Allocated memory is still 121.6MB. Free memory was 89.8MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 46]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.5s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 282 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 263 mSDsluCounter, 696 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 588 mSDsCounter, 483 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1759 IncrementalHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 483 mSolverCounterUnsat, 108 mSDtfsCounter, 1759 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 392 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 126 PreInvPairs, 196 NumberOfFragments, 59 HoareAnnotationTreeSize, 126 FomulaSimplifications, 2450 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 814 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 409 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 584 ConstructedInterpolants, 0 QuantifiedInterpolants, 1239 SizeOfPredicates, 10 NumberOfNonLiveVariables, 539 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1166/1303 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 17:26:42,227 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 Writing output log to file Ultimate.log Result: TRUE