./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/Addition01-2.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 4af9e26294eb81d37b6ccb692d0b40e4bed5b0d6d3dd72d6af1a80634692c297 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:58:38,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:58:38,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:58:38,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:58:38,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:58:38,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:58:38,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:58:38,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:58:38,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:58:38,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:58:38,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:58:38,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:58:38,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:58:38,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:58:38,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:58:38,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:58:38,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:58:38,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:58:38,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:58:38,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:58:38,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:58:38,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:58:38,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:58:38,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:58:38,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:58:38,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:58:38,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:58:38,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:58:38,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:58:38,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:58:38,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:58:38,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:58:38,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:58:38,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:58:38,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:58:38,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:58:38,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:58:38,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:58:38,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:58:38,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:58:38,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:58:38,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:58:38,260 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:58:38,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:58:38,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:58:38,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:58:38,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:58:38,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:58:38,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:58:38,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:58:38,262 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:58:38,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:58:38,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:58:38,264 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:58:38,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:58:38,264 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:58:38,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:58:38,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:58:38,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:58:38,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:58:38,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:58:38,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:58:38,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:58:38,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:58:38,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:58:38,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:58:38,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:58:38,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:58:38,269 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:58:38,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:58:38,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:58:38,270 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4af9e26294eb81d37b6ccb692d0b40e4bed5b0d6d3dd72d6af1a80634692c297 [2023-02-17 07:58:38,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:58:38,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:58:38,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:58:38,572 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:58:38,573 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:58:38,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition01-2.c [2023-02-17 07:58:39,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:58:40,455 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:58:40,456 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c [2023-02-17 07:58:40,461 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924aa1f3f/79c7e34cc4384bb8a6c2f4faed3b0550/FLAG396a2b815 [2023-02-17 07:58:40,481 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924aa1f3f/79c7e34cc4384bb8a6c2f4faed3b0550 [2023-02-17 07:58:40,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:58:40,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:58:40,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:58:40,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:58:40,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:58:40,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64253498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40, skipping insertion in model container [2023-02-17 07:58:40,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:58:40,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:58:40,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2023-02-17 07:58:40,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:58:40,662 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:58:40,695 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2023-02-17 07:58:40,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:58:40,710 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:58:40,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40 WrapperNode [2023-02-17 07:58:40,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:58:40,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:58:40,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:58:40,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:58:40,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,746 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-17 07:58:40,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:58:40,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:58:40,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:58:40,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:58:40,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,766 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:58:40,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:58:40,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:58:40,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:58:40,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (1/1) ... [2023-02-17 07:58:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:58:40,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:40,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 07:58:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 07:58:40,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:58:40,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:58:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:58:40,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:58:40,838 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2023-02-17 07:58:40,838 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2023-02-17 07:58:40,886 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:58:40,889 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:58:41,058 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:58:41,064 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:58:41,064 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 07:58:41,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:58:41 BoogieIcfgContainer [2023-02-17 07:58:41,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:58:41,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:58:41,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:58:41,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:58:41,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:58:40" (1/3) ... [2023-02-17 07:58:41,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1cae13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:58:41, skipping insertion in model container [2023-02-17 07:58:41,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:40" (2/3) ... [2023-02-17 07:58:41,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1cae13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:58:41, skipping insertion in model container [2023-02-17 07:58:41,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:58:41" (3/3) ... [2023-02-17 07:58:41,075 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2023-02-17 07:58:41,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:58:41,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:58:41,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:58:41,204 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b0ebf93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:58:41,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:58:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:58:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 07:58:41,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:41,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:41,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash 663264039, now seen corresponding path program 1 times [2023-02-17 07:58:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512694305] [2023-02-17 07:58:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:41,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:58:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512694305] [2023-02-17 07:58:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512694305] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:58:41,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:58:41,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 07:58:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351000757] [2023-02-17 07:58:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:58:41,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 07:58:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 07:58:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:58:41,729 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2023-02-17 07:58:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:41,864 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-02-17 07:58:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:58:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2023-02-17 07:58:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:41,878 INFO L225 Difference]: With dead ends: 34 [2023-02-17 07:58:41,878 INFO L226 Difference]: Without dead ends: 21 [2023-02-17 07:58:41,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:58:41,885 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:41,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 62 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-17 07:58:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-17 07:58:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-17 07:58:41,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-02-17 07:58:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:41,929 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-17 07:58:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2023-02-17 07:58:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-17 07:58:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 07:58:41,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:41,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 07:58:41,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1508496640, now seen corresponding path program 1 times [2023-02-17 07:58:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556169497] [2023-02-17 07:58:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:41,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:58:42,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:42,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556169497] [2023-02-17 07:58:42,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556169497] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:58:42,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:58:42,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 07:58:42,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344689319] [2023-02-17 07:58:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:58:42,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:58:42,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:58:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:58:42,006 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-02-17 07:58:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:42,044 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-02-17 07:58:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:58:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2023-02-17 07:58:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:42,046 INFO L225 Difference]: With dead ends: 31 [2023-02-17 07:58:42,046 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 07:58:42,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:58:42,048 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:42,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:58:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 07:58:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-02-17 07:58:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-17 07:58:42,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2023-02-17 07:58:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:42,056 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-17 07:58:42,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-02-17 07:58:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-17 07:58:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 07:58:42,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:42,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:42,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 07:58:42,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:42,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1330690599, now seen corresponding path program 1 times [2023-02-17 07:58:42,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623895728] [2023-02-17 07:58:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:42,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:42,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:42,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 07:58:42,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623895728] [2023-02-17 07:58:42,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623895728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:42,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867829542] [2023-02-17 07:58:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:42,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:42,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:58:42,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:58:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 07:58:42,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:42,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:42,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867829542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:42,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:42,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2023-02-17 07:58:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600755522] [2023-02-17 07:58:42,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:42,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:58:42,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:58:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:58:42,847 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:43,027 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-17 07:58:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:58:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2023-02-17 07:58:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:43,030 INFO L225 Difference]: With dead ends: 35 [2023-02-17 07:58:43,030 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 07:58:43,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:58:43,034 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:43,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 77 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 07:58:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2023-02-17 07:58:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-17 07:58:43,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2023-02-17 07:58:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-17 07:58:43,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-17 07:58:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 07:58:43,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:43,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:43,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:58:43,261 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 [2023-02-17 07:58:43,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1159446067, now seen corresponding path program 1 times [2023-02-17 07:58:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:43,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857769266] [2023-02-17 07:58:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:43,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857769266] [2023-02-17 07:58:43,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857769266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892144489] [2023-02-17 07:58:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:43,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:43,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:43,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:58:43,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:58:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 07:58:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:43,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:43,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892144489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:43,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-17 07:58:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581665161] [2023-02-17 07:58:43,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:58:43,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:58:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:58:43,430 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:58:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:43,483 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-02-17 07:58:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 07:58:43,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-02-17 07:58:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:43,486 INFO L225 Difference]: With dead ends: 28 [2023-02-17 07:58:43,486 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 07:58:43,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:58:43,488 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:43,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:58:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 07:58:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-17 07:58:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 07:58:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-17 07:58:43,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 20 [2023-02-17 07:58:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:43,501 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-17 07:58:43,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:58:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-17 07:58:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 07:58:43,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:43,505 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, 1, 1] [2023-02-17 07:58:43,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:43,711 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 [2023-02-17 07:58:43,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1187670683, now seen corresponding path program 1 times [2023-02-17 07:58:43,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:43,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685705920] [2023-02-17 07:58:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:43,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:58:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 07:58:43,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:43,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685705920] [2023-02-17 07:58:43,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685705920] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:43,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071131400] [2023-02-17 07:58:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:43,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:43,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:43,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:58:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:58:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 07:58:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 07:58:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 07:58:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071131400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:43,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-17 07:58:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170752536] [2023-02-17 07:58:43,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:58:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:58:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:58:43,927 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:58:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:43,962 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-02-17 07:58:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 07:58:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-02-17 07:58:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:43,964 INFO L225 Difference]: With dead ends: 29 [2023-02-17 07:58:43,964 INFO L226 Difference]: Without dead ends: 0 [2023-02-17 07:58:43,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-17 07:58:43,966 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:43,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:58:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-17 07:58:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-17 07:58:43,967 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) [2023-02-17 07:58:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-17 07:58:43,968 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2023-02-17 07:58:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:43,968 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-17 07:58:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:58:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-17 07:58:43,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-17 07:58:43,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 07:58:43,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:44,179 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 [2023-02-17 07:58:44,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-17 07:58:44,186 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-17 07:58:44,186 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-17 07:58:44,186 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2023-02-17 07:58:44,186 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-17 07:58:44,186 INFO L902 garLoopResultBuilder]: At program point L28(lines 28 47) the Hoare annotation is: true [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (<= 0 |ULTIMATE.start_main_~n~0#1|) [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 40) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= addition_~n (- 1)) (= addition_~n |addition_#in~n|) (not (= addition_~n 0)) (<= addition_~n 0)) [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 24) no Hoare annotation was computed. [2023-02-17 07:58:44,187 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L899 garLoopResultBuilder]: For program point additionFINAL(lines 15 25) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L895 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (= addition_~n |addition_#in~n|) (not (= addition_~n 0)) (<= 0 (+ addition_~n (- 1)))) [2023-02-17 07:58:44,188 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L899 garLoopResultBuilder]: For program point additionEXIT(lines 15 25) no Hoare annotation was computed. [2023-02-17 07:58:44,188 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 25) the Hoare annotation is: true [2023-02-17 07:58:44,191 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-02-17 07:58:44,193 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 07:58:44,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 07:58:44 BoogieIcfgContainer [2023-02-17 07:58:44,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 07:58:44,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 07:58:44,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 07:58:44,201 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 07:58:44,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:58:41" (3/4) ... [2023-02-17 07:58:44,205 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-17 07:58:44,211 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2023-02-17 07:58:44,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-17 07:58:44,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-02-17 07:58:44,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-17 07:58:44,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-17 07:58:44,243 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 07:58:44,243 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 07:58:44,244 INFO L158 Benchmark]: Toolchain (without parser) took 3757.98ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 61.1MB in the beginning and 41.1MB in the end (delta: 20.1MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,244 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 43.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:58:44,244 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.50ms. Allocated memory is still 115.3MB. Free memory was 60.7MB in the beginning and 87.2MB in the end (delta: -26.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.26ms. Allocated memory is still 115.3MB. Free memory was 87.2MB in the beginning and 89.0MB in the end (delta: -1.9MB). Peak memory consumption was 2.4MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,245 INFO L158 Benchmark]: Boogie Preprocessor took 21.50ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 88.3MB in the end (delta: 695.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:58:44,245 INFO L158 Benchmark]: RCFGBuilder took 297.35ms. Allocated memory is still 115.3MB. Free memory was 88.3MB in the beginning and 78.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,245 INFO L158 Benchmark]: TraceAbstraction took 3132.68ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 77.8MB in the beginning and 44.2MB in the end (delta: 33.6MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,246 INFO L158 Benchmark]: Witness Printer took 42.07ms. Allocated memory is still 138.4MB. Free memory was 44.2MB in the beginning and 41.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-17 07:58:44,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 43.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.50ms. Allocated memory is still 115.3MB. Free memory was 60.7MB in the beginning and 87.2MB in the end (delta: -26.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.26ms. Allocated memory is still 115.3MB. Free memory was 87.2MB in the beginning and 89.0MB in the end (delta: -1.9MB). Peak memory consumption was 2.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.50ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 88.3MB in the end (delta: 695.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 297.35ms. Allocated memory is still 115.3MB. Free memory was 88.3MB in the beginning and 78.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3132.68ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 77.8MB in the beginning and 44.2MB in the end (delta: 33.6MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Witness Printer took 42.07ms. Allocated memory is still 138.4MB. Free memory was 44.2MB in the beginning and 41.1MB in the end (delta: 3.1MB). 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: 45]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 96 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 78 mSDsluCounter, 245 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 166 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 304 IncrementalHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 79 mSDtfsCounter, 304 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 122 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=4, InterpolantAutomatonStates: 33, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 44 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 213 ConstructedInterpolants, 0 QuantifiedInterpolants, 926 SizeOfPredicates, 15 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 49/63 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! [2023-02-17 07:58:44,297 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