./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested3-1.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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:33:59,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:33:59,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:33:59,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:33:59,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:33:59,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:33:59,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:33:59,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:33:59,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:33:59,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:33:59,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:33:59,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:33:59,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:33:59,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:33:59,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:33:59,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:33:59,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:33:59,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:33:59,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:33:59,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:33:59,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:33:59,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:33:59,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:33:59,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:33:59,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:33:59,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:33:59,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:33:59,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:33:59,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:33:59,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:33:59,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:33:59,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:33:59,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:33:59,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:33:59,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:33:59,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:33:59,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:33:59,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:33:59,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:33:59,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:33:59,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:33:59,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:33:59,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:33:59,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:33:59,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:33:59,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:33:59,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:33:59,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:33:59,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:33:59,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:33:59,512 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:33:59,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:33:59,513 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:33:59,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:33:59,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:33:59,515 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:33:59,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:33:59,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:33:59,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:33:59,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:33:59,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:33:59,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:33:59,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:33:59,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:33:59,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:33:59,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:33:59,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:33:59,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:33:59,517 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:33:59,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:33:59,517 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:33:59,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2023-02-16 01:33:59,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:33:59,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:33:59,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:33:59,751 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:33:59,751 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:33:59,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-16 01:34:00,787 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:34:00,993 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:34:00,993 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-16 01:34:01,008 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561e173c7/189068a6a08b46619670635ea4af2e75/FLAG48f3772ce [2023-02-16 01:34:01,024 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561e173c7/189068a6a08b46619670635ea4af2e75 [2023-02-16 01:34:01,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:34:01,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:34:01,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:34:01,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:34:01,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:34:01,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba62c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01, skipping insertion in model container [2023-02-16 01:34:01,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:34:01,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:34:01,132 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-16 01:34:01,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:34:01,160 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:34:01,170 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-16 01:34:01,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:34:01,182 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:34:01,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01 WrapperNode [2023-02-16 01:34:01,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:34:01,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:34:01,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:34:01,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:34:01,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,201 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-16 01:34:01,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:34:01,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:34:01,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:34:01,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:34:01,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:34:01,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:34:01,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:34:01,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:34:01,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (1/1) ... [2023-02-16 01:34:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:34:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:01,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 01:34:01,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 01:34:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:34:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:34:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:34:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:34:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:34:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:34:01,367 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:34:01,368 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:34:01,485 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:34:01,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:34:01,490 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 01:34:01,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:34:01 BoogieIcfgContainer [2023-02-16 01:34:01,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:34:01,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:34:01,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:34:01,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:34:01,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:34:01" (1/3) ... [2023-02-16 01:34:01,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bcd35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:34:01, skipping insertion in model container [2023-02-16 01:34:01,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:34:01" (2/3) ... [2023-02-16 01:34:01,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bcd35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:34:01, skipping insertion in model container [2023-02-16 01:34:01,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:34:01" (3/3) ... [2023-02-16 01:34:01,512 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2023-02-16 01:34:01,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:34:01,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:34:01,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:34:01,560 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;@282c2d9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:34:01,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:34:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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) [2023-02-16 01:34:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 01:34:01,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:01,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:01,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2023-02-16 01:34:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:01,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961536561] [2023-02-16 01:34:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:01,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961536561] [2023-02-16 01:34:01,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961536561] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:34:01,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:34:01,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:34:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731939272] [2023-02-16 01:34:01,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:34:01,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:34:01,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:34:01,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:01,788 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:01,830 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2023-02-16 01:34:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:34:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 01:34:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:01,839 INFO L225 Difference]: With dead ends: 45 [2023-02-16 01:34:01,839 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 01:34:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:01,847 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:01,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:34:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 01:34:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-02-16 01:34:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:34:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-16 01:34:01,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-02-16 01:34:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:01,890 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-16 01:34:01,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-16 01:34:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:34:01,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:01,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:34:01,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2023-02-16 01:34:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:01,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983139434] [2023-02-16 01:34:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:01,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983139434] [2023-02-16 01:34:01,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983139434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:34:01,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:34:01,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:34:01,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409485483] [2023-02-16 01:34:01,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:34:01,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:34:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:34:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:01,985 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:02,005 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-02-16 01:34:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:34:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:34:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:02,006 INFO L225 Difference]: With dead ends: 35 [2023-02-16 01:34:02,006 INFO L226 Difference]: Without dead ends: 21 [2023-02-16 01:34:02,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:02,007 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:02,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:34:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-16 01:34:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-02-16 01:34:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:34:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-02-16 01:34:02,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-02-16 01:34:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:02,012 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-02-16 01:34:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-02-16 01:34:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 01:34:02,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:02,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:34:02,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2023-02-16 01:34:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:02,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875557028] [2023-02-16 01:34:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:02,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875557028] [2023-02-16 01:34:02,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875557028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:34:02,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:34:02,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:34:02,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927183023] [2023-02-16 01:34:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:34:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:34:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:34:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:02,112 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:02,128 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-16 01:34:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:34:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-16 01:34:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:02,131 INFO L225 Difference]: With dead ends: 35 [2023-02-16 01:34:02,132 INFO L226 Difference]: Without dead ends: 20 [2023-02-16 01:34:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:34:02,134 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:34:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-16 01:34:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-02-16 01:34:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:34:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-16 01:34:02,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2023-02-16 01:34:02,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:02,143 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-16 01:34:02,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-16 01:34:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 01:34:02,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:02,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:02,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 01:34:02,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:02,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2023-02-16 01:34:02,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:02,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593860029] [2023-02-16 01:34:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:02,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593860029] [2023-02-16 01:34:02,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593860029] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:34:02,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466361949] [2023-02-16 01:34:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:02,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:02,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:02,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:34:02,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:34:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:34:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:34:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:34:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466361949] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:34:02,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:34:02,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-16 01:34:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215260688] [2023-02-16 01:34:02,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:34:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 01:34:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 01:34:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-16 01:34:02,371 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:02,405 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-02-16 01:34:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:34:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 01:34:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:02,406 INFO L225 Difference]: With dead ends: 39 [2023-02-16 01:34:02,406 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 01:34:02,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:34:02,407 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:02,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:34:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 01:34:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-16 01:34:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:34:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-16 01:34:02,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-02-16 01:34:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:02,412 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-16 01:34:02,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-16 01:34:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:34:02,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:02,413 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:02,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 01:34:02,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:02,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2023-02-16 01:34:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148964308] [2023-02-16 01:34:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148964308] [2023-02-16 01:34:02,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148964308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:34:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946906708] [2023-02-16 01:34:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:34:02,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:02,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:34:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:34:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:34:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:34:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 01:34:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:34:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:34:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:02,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946906708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:34:02,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:34:02,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-16 01:34:02,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998024900] [2023-02-16 01:34:02,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:34:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:34:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:34:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:34:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:34:02,890 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:34:03,215 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-02-16 01:34:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:34:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 01:34:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:34:03,216 INFO L225 Difference]: With dead ends: 48 [2023-02-16 01:34:03,216 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 01:34:03,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:34:03,217 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:34:03,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:34:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 01:34:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-16 01:34:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:34:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-16 01:34:03,221 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2023-02-16 01:34:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:34:03,221 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-16 01:34:03,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:34:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-16 01:34:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 01:34:03,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:34:03,222 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:34:03,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:34:03,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:03,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:34:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:34:03,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2023-02-16 01:34:03,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:34:03,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892757989] [2023-02-16 01:34:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:34:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:34:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:34:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:34:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:34:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892757989] [2023-02-16 01:34:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892757989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:34:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77509974] [2023-02-16 01:34:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:34:03,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:34:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:34:03,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:34:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:34:03,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 01:34:03,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:34:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:34:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates...